2437 UKF U2-01 - Startseite UKF - Universal-Kugellager ...ukf.de/images/ukf/downloads/Lagerkatalog_2014_engl.pdf2437 UKF 04-05 22.08.2013 12:27 Uhr Seite 1 Probedruck C M Y CM MY CY

2437 UKF U1-U4 26.08.2013 11:37 Uhr Seite 1

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C M Y CM MY CY CMY K

Kienhorststraße 53 • D - 13403 Berlin (Reinickendorf)Tel.: ++49 (0)30. 41 00 04-0 • Fax ++49 (0)30. 413 20 46www.ukf.de • e-mail: [email protected]

UKF delivers ex works Berlin, overnight by air or ex stockfrom our distributors abroad in Europe, overseas, Far East.

UNIVERSAL-KUGELLAGER-FABRIK GMBH

www.ukf.de

High Precision Spindle Bearings

Angular Contact Ball Bearings with Spacer Balls

Bearing Cartridges

Ball Screw Support Bearings

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UKF: High Precision Bearings and Bearing Cartridges

UKF bearings, single-row, double-row and multi-row cartridge assemblies, embody experience

and continuous product and process improvement. Single-source product design,

development and manufacture provide the customer with maximum value.

UKF bearings with ball separators, in lieu of conventional rigid

cage configurations, fulfill the requirements for the most

demanding accuracy and longevity applications.

2437-1

3

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Angular Contact Ball Bearings

with Spacer Balls

Bearing Cartridges


1

This catalogue supersedes all previous issues (No. 3180)

We reserve the right to make changes which serve the technical progress

Copyright: This catalogue or parts thereof may not be reproduced without our permission.

UKF Universal Kugellager Fabrik GmbH

Kienhorststr. 53, D-13403 Berlin (Reinickendorf)

Tel.: ++49 (0)30. 41 00 04-0, Fax: ++49 (0)30. 413 20 46

E-mail: [email protected]

Internet: www.ukf.de

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21º

optim

al

B

15º25

º

dD

ra

α

Range of UKF Spindle Bearings

ra

2

Bore Diameter (I.D.)Outside Diameter (O.D.)WidthContact Angle

matching parts dimensions

Dynamic LoadStatic LoadAxial RigidityRadial RigidityWeightSpeed

mmmmmmdegree

NNN/μmN/μmkgrpm

rpm

da

Da

}

70 AFDCFloatingBearing

in accordance withDIN 628 Part 5

upon r

eques

t

70719 719 twin 70 70 twin 719 70

(73 UM)(72 UL)

718

Form FactorAF 70

GSX

d:D:B:α:da:Da:ra:C:Co:Ra:Rr:m:n:

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USS USOUSS USO

UHSUHS

K/UK

UL

UM

USS

XH..USSC

XH..UHC

XH..USS

USSC

XH..USOC

XH..USO

USOC

XH..USSC

XH..USS

USSC

XH..USOC

XH..USO

USOC

UHC

UHC

XH..UHC

P. 4P. 5P. 5P. 6P. 6

P. 7P. 8P. 8P. 10

P. 12P. 12P. 14

P. 16P. 16

P. 18P. 18

P. 20P. 21P. 22P. 22

P. 24P. 24

P. 26P. 26

P. 28P. 28P. 28P. 28

General Technology OverviewBearing AssembliesPreload and RigidityLoad carrying capacity and speedBearings with Ceramic BallsBearings of CRONIDEX®-Steel

UKF Spindle BearingsSingle Row, Double RowDesign Series 719 USS, 719 USO Series 70 USS, 70 USO

Preload and rigidity

UKF Spindle Bearings withCeramic Balls (Hybrid Bearings) Series 719 USSC, 719 USOC Series 70 USSC, 70 USOC

Preload and rigidity

Spindle Bearings of CRONIDEX® Steelwith Steel Balls Series XH 719 USS, XH 719 USO Series XH 70 USS, XH 70 USO

UKF Spindle Bearings withCRONIDEX® Steel with Ceramic Balls Series XH 719 USSC, XH 719 USOC Series XH 70 USSC, XH 70 USOC

UKF High SpeedSpindle BearingsDesignBearing Seat Dimensions Series 719 UHS Series 70 UHS

UKF High SpeedSpindle Bearings withCeramic Balls (Hybrid Bearings) Series 719 UHC Series 70 UHC

UKF High SpeedSpindle Bearings of CRONIDEX® Steelwith Ceramic Balls (Hybrid Bearings) Series XH 719 UHC Series XH 70 UHC

OptionsVariant with shieldsVariant with Direct LubricationVariable Pre-Load VARIORINGSeries 718

UKF Angular Contact Ball Bearingswith Spacer BallsDesign Series K, UK Series UL, UM

Elasticity and RigidityDesign Example

UKF Spindle Bearings foraxial expansion of shaft- Floating Bearing -Design Series 70 AFSC, 70 AFDC

UKF Bearing Cartridgesready for installationDesign Series PLKS, PLKH Series LKS, LKH

Dimensions LKLSDimensions PLKLS LKLS, PLKLS

Bearing System LSDesign Example

PrecisionRunning Accuracy/Dimensional AccuracyMachining tolerances of bearing seats(shaft and housing)

Assembly RecommendationsLubricationTemperature, FrictionNoise

UKF Ball Screw Support Bearings,Cartridges ready for installationDesign Series GSX Series FSX, FDX

Design Examples

UKF Components (parts)Distance Rings DRSplash Rings SRLock Nuts NM (A, B, X)

UKF Special Design and ApplicationsCalculation PrinciplesPart Number DesignationsEquivalent Bearing TypesSymbols and Conversions

P. 30P. 31P. 32P. 34P. 35

P. 36P. 37

P. 38P. 40P. 41P. 42P. 43P. 44P. 45P. 45

P. 46P. 47P. 48

P. 49P. 50P. 51P. 51

P. 52P. 53P. 54

P. 56

P. 57P. 57P. 58

P. 59P. 60P. 62P. 64P. 64

Contents

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Bearing Arrangements Application Recommendations

Bearing Sets

A pair of single bearings, or a double-row bearing in O-configuration (DB).Outstanding parallelism and high runningprecision, higher stiffness, and simpleinstallation, all by locking the inner ringsagainst each other. Single-piece outerring is also advantageous for applicationsrequiring a Floating Bearing within itshousing.

for mid-size axial forces, higher speeds,such as Internal Grinding

for higher axial forcesand medium speeds, such as drilling

for axial forces with medium or higherspeeds, such as Milling, Turning, Fineboring.Optional: Bearing Set with spring forproper pre-load

for higher radial and axial forces in bothdirections, including External Grinding

for higher radial and axial forces, suchas heavy duty Milling/Drilling

Bearing Cartridges

DB O-Configuration (USO-Type)DT TandemDF X ConfigurationTT TriplexTBT Tandem-OQBC Tandem-O-Tandem2DB Double-OPBC

„O-configuration” DB

2 single row or1 double row bearing (USO Type)

„Tandem” DT

„Triplex” TT

„Tandem-O” TBT

3 single row or1 single row and1 double row bearing

„Quattro” QBC


PBC


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The static and dynamic load capacity shown in the tablesis for single row- or double row-bearings as per the typespecification. Compared with single row-bearings, doublerow-bearings achieve approximately twice the load capacity;unlike separate bearings, the load distribution is symme-

trical.

For dynamic load capacity, see”calculation principals”, page 60.relationship between „speed—loadcapacity—lifetime” is also shown.

For technical and design characteristicsof specific bearing configurations, in-cluding fatigue life calculations, please

request a proposal from our Applications EngineeringDepartment.

We stand ready to assist you.

Preloaded bearings provide both High Running Precisionand High Rigidity even under load (axial and radial forces).In their free state, such Inner Rings appear slightly offset,but installed coplanar upon proper installation, in accor-dance with the factory preload settings. Similarly, doublerow UKF-Spindle Bearings Type “USO”have a small gap between the Inner Rings,which closes during assembly, applyingthe correct preload.

Because preload translates into friction,use only the amount necessary—no more!Besides the usual classes of preload,L/M/S, UKF can also, upon request,prepare the bearings with preloadsmeeting specific requirements. For example: „Super Light“with its value lower than standard „Light“.

Rigidity, resulting from the bearing’s geometry, its preload,and its assembly and fit parameters (shaft and housingtolerances) will determine the running accuracy of theBearings/Spindle. Multiple-row Bearing Assemblies provideinherently advantageous dimensional tolerances. Conse-quently, the one part, double-row Outer Ring of “USO”-Type Bearings yields higher stiffness even to BearingAssemblies, such as the TBT and QBC configurations, forexample, below.

attuned to each requirement:application-specific preloads

Double Row Bearings withhigher stiffness

Preload and Rigidity Load capacity and speed (RPM)

Stiffness of Bearing Sets

Bearing assembly Ra Set [N/μm] Rr Set [N/μm]

DB Ra Rr

DT 2 Ra Rr

TBT 1,83 Ra 1,42 Rr

QBC 2 Ra 2 Rr

Ra , Rr Rigidity see tables for respective series

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Silicon-Nitride, Si3N4, is an exceptionally strong and rigidcompound, with merely 40% of the specific gravity ofsteel. Balls made from this material can operate at bothhigher speeds, and for longer life cycles. Lower centrifugalforces and lower friction allow reduced wear and lowertemperature rise.

The approximately 1.5-fold increase in the modulus ofelasticity, in relation to steel balls, yields higher bearingrigidity, as shown in the table.

Hybrid Bearings with their special greases provide an easypath to increase both speed limits and rigidity, whilemaintaining the same bearing form-factor.

Marking: “…C” within the Type Specification USS/USO →USSC/USOC, UHS → UHC, for example 70 UHC 50…

Developed as corrosion-resistant steel for aerospaceapplications, this alloy’s high strength has also provenitself to be ideal for Spindle Bearings. Compounded withcarbon, molybdenum, and increased levels of nitrogen,it achieves a hardness comparable to Bearing Steel 100Cr 6, > 58 HRc, but with higher fatigue and wear resistance.

For Spindle Bearings, this means:- longer life (fatigue-endurance)- higher dynamic rating (load capacity)- higher operating speeds (cutting speed)- lower temperature rise.

UKF Spindle Bearings marked “XH”, that is with ceramicballs (Hybrid Bearings “…C”), are available with eitherpermanent, long life grease lubrication or continuouslubrication (“LB”), represent the current state-of-the-artin Spindle Bearing Design:

“XH USSC…” Hybrid Spindle Bearing, Single Row“XH USOC…”Hybrid Spindle Bearing, Double Row“XH UHC…” Hybrid High Speed Spindle Bearing, Single Row

Design with Ceramic Balls(Hybrid Bearings)

Design “XH”of CRONIDEX®-Steel

Ratio of Centrifugal ForcesCeramic 0,4 : Steel 1,0

100 Cr 6

Si N3 4

Angle of Contact

Steel Hardness Elasticity Density

100 Cr6 HV 700 210 kN/mm 7,9 g/cm3

Si3N4 HV 1600 320 kN/mm 3,2 g/cm3


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UKF Spindle BearingsSeries 719, 70 USS Single Row / USO Double Row

PreloadGap

PreloadGap

15º

25º

21ºoptimal

Experience and Development

High-accuracy rotation, power, and load forces can all befulfilled with UKF Bearings and Bearing Cartridges. Bearingsare also available as Double-Row-Bearings, with application-optimised contact angle, variable pre-load, special alloysteels, and even Special Designs for particular application,all upon request.

Design: Single row „USS“ or Double row “USO”; made ofBearing Steel 100 Cr 6, or high strength CRONIDEX®, Steelor Ceramic balls, and self-guiding full retainers (fibre,brass). Series 719 and 70, i.e., dimension series 19 and10,are in accordance with DIN 628-6.Series 718 available upon request.Dimensions for UKF Double RowSpindle Bearings correspond to astandard pair of Single Row Bearingsin O-configuration („DB“). Double rowBearings, relative to Single bearings,have better axial running accuracy dueto the unitized outer ring and providehigher speed limits; the one-part outerring imparts a higher stiffness to the bearing seat, andas a Floating Bearing, yields better axial guidance.Another advantage is the central lubricant feed, and theresulting extended lubricant reserve between the bearings.Assembly is simplified with reduced parts handling, andthe bearings have the proper preload set at the factory.The inner rings need only to be locked against each other.

Note: Two Single Row-Bearings “70 USS 50” “DB” correspondto one Double Row-Bearing “70 USO 50”. UKF bearingsmay also be combined to provide other configurations,for example: combining one each USS and USO can makea TBT arrangement. UKF Spindle Bearings, in general, areproduced as “Universal-Bearings”, so that they may readilybe assembled into different bearing configurations.Consequently, this feature, combined with the optimisedcontact angle, α = 21°, instead of 15° or 25°, facilitatesboth production and spares inventories and logistics.

Options

Special Contact Angles, ranging from 12° to 30°, as peragreement. Bearings with integral shields → page 28

Lubrication feed, through the outer ring, directly into theraceway → page 28

Pre-lubricated bearings; packed with proven high-performance grease; filled with the exact quantity - sobearing is ready for installation → page 50

Notice: the High Speed Spindle Bearings → page 20These are furnished with a 15° contact angle, respectively,

25° upon application

Optimum 21° Contact Angle

With an intermediate contact angle ofα = 21°, these bearings achieve excellentperformance advantages over the morecommon 15° and 25° contact angles:

- compared to 15°, a higher axial rigidity and axial load capacity- compared to 25°, a higher Speed Limit, i.e., higher RPM.

Double Row „USO“:higher speed, higher accuracy,easier assemblyOptimum Contact Angle of 21°:Best configuration for increasedaxial load capacity and maximumspeed limit

R a [N/μm]n lim

Rigidity Advantage

[mm]

A15

15 40

10000

20000

10060 80 120d

40000

30000

50000

A21

200

50

150

100

300

400

5000

A25

Speed Advantage

A21

Axial Rigidity and Speed Limit, i.e., type 719 USS

RPM

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UKF Spindle BearingsSeries 719 USS, 719 USO

and 70 USS, 70 USO

15

17

20

25

30

35

40

45

50

55

60

28283232

30303535

37374242

42424747

47475555

55556262

62626868

68687575

72728080

80809090

85859595

7149

18

7141020

9181224

9181224

9181326

10201428

12241530

12241632

12241632

13261836

13261836

67000640006100058000

62000590005500053000

51000480004600044000

43000410004000038000

37500360003400032000

32000305002950028000

28000270002600025000

25000240002400023000

24000230002200021000

21000200002000019000

20000190001850017500

0,020,030,030,06

0,020,030,040,08

0,040,070,070,14

0,040,080,080,16

0,050,090,110,22

0,080,150,150,30

0,110,220,180,36

0,130,260,240,48

0,130,260,250,50

0,180,360,380,76

0,190,370,410,82

25,525,528,528,5

27,527,531,031,0

34,034,037,037,0

39,039,042,042,0

44,044,049,049,0

50,550,555,555,5

58,058,061,061,0

63,563,568,568,5

68,068,073,573,5

75,575,583,083,0

80,580,588,088,0

17,517,518,518,5

19,519,521,021,0

23,023,025,025,0

28,028,030,030,0

33,033,036,036,0

39,539,541,541,5

44,044,047,047,0

49,549,551,551,5

54,054,056,556,5

59,559,562,062,0

64,564,567,067,0

0,150,150,30,3

0,150,150,30,3

0,150,150,60,6

0,150,150,60,6

0,150,151,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

44000410003950037500

40000375003600034000

33000310003000028000

28000265002600024000

24000230002200021500

21000195001950018500

18000170001700016000

16500155001550014500

15500145001400013500

14000130001250012000

13000120001200011000

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

15151515

17171717

20202020

25252525

30303030

35353535

40404040

45454545

50505050

55555555

60606060

2600520036007200

2800570040008000

410082006400

12800

490098008200

16400

5700114001000020000

9400188001340026800

10800216001370027400

12800256001930038600

13000260002230044600

18900378002420048200

21400428002680053700

460083006400

11000

480085007400

13300

7000126001080018400

7300132001340024100

7800141001470026500

12800230001810032500

13500243001850033100

13600245002580046400

14400259002780049900

21500387002850051300

22900412003160056900

Ratings

NC0

NCd D B

mm

UKF Type

Single-/Double row withfibre cage, preloaded,optimal angle of contact α = 21º;15º...25º upon request.

Calculation factors forSpeed Limit (Precision,Preload, Configuration)

Calculation Principles

Dimensions:USS similar to Single Row Bearing Series 719/70USO similar to a Pair Single Row Bearings Series 719/70

Nominal SizenlimRPM

Speed Limit

Greaselubrication

minimum oillubrication

Seat Dimensions

ra da Da m

Mass

a

a

a

a

dD

B

d

r

D

r

USS USO

D

a

a a

a

d

B

r

d D

r


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65

70

75

80

85

90

100

110

120

130

140

150

9090

100100

100100110110

105105115115

110110125125

120120130130

125125140140

140140150150

150150170170

165165180180

180180200200

190190210210

210210225225

13261836

16322040

16322040

16322244

18362244

18362448

20402448

20402856

22442856

24483366

24483366

28563570

18500175001750016000

17000160001600015000

16000150001500014500

15000145001400013000

14000135001350013000

13500130001250012000

12000115001150011000

1100010500100009500

10000950092009000

9400900086008200

8500800080007500

8000750075007200

0,210,410,430,85

0,330,660,601,20

0,350,700,611,35

0,380,750,871,75

0,531,050,901,80

0,581,151,152,30

0,781,561,302,60

0,851,702,004,00

1,152,302,154,30

1,553,103,256,55

1,633,263,507,00

2,555,104,258,50

85,585,593,093,0

94,594,5

102,0102,0

99,599,5

107,0107,0

104,5104,5116,0116,0

114,5114,5121,0121,0

118,5118,5130,0130,0

132,0132,0140,0140,0

143,0143,0158,0158,0

151,0151,0168,0168,0

171,0171,0185,5185,5

181,5181,5195,5195,5

199,0199,0209,5209,5

69,569,572,072,0

75,575,578,078,0

80,580,583,083,0

85,585,589,089,0

92,592,594,094,0

96,596,5

100,0100,0

107,0107,0110,0110,0

117,0117,0122,0122,0

128,0128,0132,0132,0

139,0139,0144,5144,5

148,5148,5154,5154,5

161,0161,0165,5165,5

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,60,61,01,0

0,60,61,21,2

0,60,61,21,2

0,60,61,21,2

0,60,61,51,5

0,60,61,51,5

0,60,61,51,5

1,01,01,51,5

12000115001100010500

1100010000100009500

10000950095009000

9500900090008500

9000850085008000

8500800080007500

7500700075007000

7000650065006000

6500600060005800

6000550056005000

5500500052004800

5000450048004400

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

65656565

70707070

75757575

80808080

85858585

90909090

100100100100

110110110110

120120120120

130130130130

140140140140

150150150150

22300446002860057200

29000580003810076200

30500610004060081200

320006400050500

101000

418008360057500

115000

436008720069000

139000

5900011850078600

157200

62000124000100000200000

78500157000107000215000

94400188800138000276000

100000201000146600293200

133000266500178000357000

23000414003250058500

30400547004300077400

31100560004430079700

31800572005710097200

410007380060500

102200

424007560069600

125300

555009360078500141300

5500097900

103000171700

68900120000105000180300

83200149800136300244000

85500152500139100

250400

115000187000175000284000

single row f3 = 1,0

DT = 0,95

DB = 0,9

TBT = 0,75

QBC = 0,85

** combined with USS

Favorable Speed Limit Factor f3 by using Type USO

double row, like USO

DB = 1,0

TBT ** = 0,9

QBC ** = 0,85

2DB = 0,8

UKF Spindle BearingsSeries 719 USS, 719 USOand 70 USS, 70 USO

Ratings

NC0

NCd D B UKF Type

Nominal SizenlimRPM

Speed Limit

Greaselubrication


Seat Dimensions

ra da Da m

Mass

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71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

Preload and RigidityUKF Spindle Bearings with Steel Balls

15

17

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

100

110

120

130

140

150

3040

4050

6070

7080

70100

90120

100130

130170

130180

180240

190250

200250

250330

260340

270410

320430

370510

440540

470720

550730

670930

720940

8901100

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

USS / USOUSS / USO

Ld

UKF Type

100130

110150

180210

200240

220300

260350

290370

380500

400530

540720

560750

580760

7501000

7801020

8101260

9601280

11001520

13201620

14202140

16502200

20202780

21602880

26803240

200260

220310

360430

400470

440610

520700

580750

7601010

8001030

10401420

11201520

11601540

15001940

15602040

16202520

19202560

22003040

26403200

28404300

33004400

40405600

43205760

53606440

2932

3436

4243

4951

5357

6168

6873

7983

8289

95105

105110

110115

120130

125135

130140

145150

155170

170180

180205

200215

220230

230240

250260

4348

5052

6063

6974

7882

8791

97105

115120

120125

140150

160165

165170

175185

180195

190205

205215

225245

250260

260295

290310

315335

330350

360370

5460

6066

7680

8793

98105

110120

120130

140150

150160

170185

190200

195205

220235

230245

240255

260270

280310

310330

330375

365390

395420

415440

450465

115130

135145

170175

195205

215230

245275

275295

320335

330355

385415

420435

440455

485520

510545

530570

580600

630690

690730

730830

810860

880940

920970

10001040

175190

190210

240250

280300

315330

350390

390420

455480

480510

560600

600630

630660

700750

730790

760820

840860

900990

10001060

10501190

11701240

12701350

13301410

14501490

220240

240265

305320

350375

395415

445495

490530

570610

610640

690750

760800

790830

880940

920990

9601040

10501080

11401250

12601320

13301500

14701560

16001700

16801780

18301880

M S L M S L M S

Optimal Contact Angle α = 21°

Compared to 15°-Bearings, only slightly reduced Maximum Speed, but approximately 60 % higher Axial Rigidity !

Series 719 USS, 70 USS as Single Row (paired in O- or X-arrangement), 719 USO, 70 USO as Double Row

Axial Preload Fv(N) Radial Rigidity Rr(N/μm)Axial Rigidity Ra(N/μm)

10 w w w. u k f . d e

2437 UKF 10-11 22.08.2013 12:28 Uhr Seite 2

Probedruck


11w w w. u k f . d e

2437 UKF 12-13 22.08.2013 12:30 Uhr Seite 1

Probedruck


nlimRPM

Speed Limit

Greaselubrication


Ratings Seat DimensionsNominal Size Mass

Single/Double row, with fibrecage, preloaded, optimal contactangle, α = 21°;15°…25° upon request.

Calculation factors for MaximumSpeed Limit (Precision, Preload, Configuration)


Dimensions:

USSC similar to Single Row Bearing Series 719/70

USOC similar to a pair Single Row Bearings 719/70

UKF Spindle Bearingswith Ceramic Balls (Hybrid Bearings)Series 719 USSC, 719 USOC and 70 USSC, 70 USOC

28283232

30303535

37374242

42424747

47475555

55556262

62626868

68687575

72728080

80809090

85859595

7149

18

7141020

9181224

9181224

9181326

10201428

12241530

12241632

12241632

13261836

13261836

93800896008540081200

86800826007700074200

71400672006440061600

60200574005600053200

52500504004760044800

44800427004130039200

39200378003640035000

35000336003360032200

33600322003080029400

29400280002800026600

28000266002590024500

0,010,030,030,05

0,020,030,040,07

0,030,060,060,13

0,040,070,070,14

0,040,080,100,19

0,070,130,130,26

0,100,190,160,32

0,110,230,210,42

0,110,230,220,45

0,160,320,330,67

0,160,310,350,70

25,525,528,528,5

27,527,531,031,0

34,034,037,037,0

39,039,042,042,0

44,044,049,049,0

50,550,555,555,5

58,058,061,061,0

63,563,568,568,5

68,068,073,573,5

75,575,583,083,0

80,580,588,088,0

17,517,518,518,5

19,519,521,021,0

23,023,025,025,0

28,028,030,030,0

33,033,036,036,0

39,539,541,541,5

44,044,047,047,0

49,549,551,551,5

54,054,056,556,5

59,559,562,062,0

64,564,567,067,0

0,150,150,30,3

0,150,150,30,3

0,150,150,60,6

0,150,150,60,6

0,150,151,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

61600574005530052500

56000525005040047600

46200434004200039200

39200371003640033600

33600322003080030100

29400273002730025900

25200238002380022400

23100217002170020300

21700203001960018900

19600182001750016800

18200168001680015400

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

15151515

17171717

20202020

25252525

30303030

35353535

40404040

45454545

50505050

55555555

60606060

1430286019803960

1570313522004400

2255451035207040

2695539045109020

313562705500

11000

5170103407370

14740

5940118807535

15070

7040140801061521230

7150143001226524530

10395207901331026510

11770235401474029535

3220581044807700

3360595051809310

490088207560

12880

511092409380

16870

54609870

1029018550

8960161001288022750

9450170101295023170

9520171501806032480

10080181301946034930

15050270901995035910

16030288402212039830

NC0

NCd D B

mm

UKF Type ra da Da

mm

m

kg

15

17

20

25

30

35

40

45

50

55

60

a

a

a

a

USOC

D d

B

r

dD

r

a

a

a

a

dD

B

d

r

D

r

USSC

12 w w w. u k f . d e

2437 UKF 12-13 22.08.2013 12:30 Uhr Seite 2

Probedruck


nlimRPM

Speed Limit

Greaselubrication



65

70

75

80

85

90

100

110

120

130

140

150

9090

100100

100100110110

105105115115

110110125125

120120130130

125125140140

140140150150

150150170170

165165180180

180180200200

190190210210

210210225225

13261836

16322040

16322040

16322244

18362244

18362448

20402448

20402856

22442856

24483366

24483366

28563570

25900245002450022400

23800224002240021000

22400210002100020300

21000203001960018200

19600189001890018200

18900182001750016800

16800161001610015400

15400147001400013300

14000133001280012600

13100126001200011400

11900112001120010500

11200105001050010000

0,170,350,370,72

0,280,560,511,02

0,300,600,521,15

0,320,640,741,49

0,450,890,771,53

0,490,980,981,96

0,661,331,112,21

0,721,451,703,40

0,981,961,833,66

1,322,642,765,57

1,382,772,985,95

2,174,343,617,23

85,585,593,093,0

94,594,5

102,0102,0

99,599,5

107,0107,0

104,5104,5116,0116,0

114,5114,5121,0121,0

118,5118,5130,0130,0

132,0132,0140,0140,0

143,0143,0158,0158,0

151,0151,0168,0168,0

171,0171,0185,5185,5

181,5181,5195,5195,5

199,0199,0209,5209,5

69,569,572,072,0

75,575,578,078,0

80,580,583,083,0

85,585,589,089,0

92,592,594,094,0

96,596,5

100,0100,0

107,0107,0110,0110,0

117,0117,0122,0122,0

128,0128,0132,0132,0

139,0139,0144,5144,5

148,5148,5154,5154,5

161,0161,0165,5165,5

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,60,61,01,0

0,60,61,21,2

0,60,61,21,2

0,60,61,21,2

0,60,61,51,5

0,60,61,51,5

0,60,61,51,5

1,01,01,51,5

16800161001540014700

15400140001400013300

14000133001330012600

13300126001260011900

12600119001190011200

11900112001120010500

105009800

105009800

9800910091008400

9100840084008100

8400770078007000

7700700072006700

7000630067006100

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

65656565

70707070

75757575

80808080

85858585

90909090

100100100100

110110110110

120120120120

130130130130

140140140140

150150150150

12265245301573031460

15950319002095541910

16775335502233044660

17600352002777555550

22990459803162563250

23980479603795076450

32450651754323086460

341006820055000

110000

431758635058850

118250

5192010384075900151800

5500011000080630

161260

7315014630097900

195800

16100289802275040950

21280382903010054180

217703920031010

55790

22260400403997068040

28700516604235071540

29680529205180087710

38850655205502098910

385006853072100

120190

482308400073500

126210

58240104860

95410170800

5985010675097370

175280

80500130900122500198800

NC0

NCd D B

mm

UKF Type ra da Da

mm

m

kg

single row f3 = 1,0

DT = 0,95

DB = 0,9

TBT = 0,75

QBC = 0,85


double row, Type USO

DB = 1,0

TBT ** = 0,9

QBC ** = 0,85

2DB = 0,8



2437 UKF 14-15 22.08.2013 12:30 Uhr Seite 1

Probedruck


Optimal Contact Angle α = 21°

Compared to 15°-Bearings, only slightly reduced Maximum Speed, but approximately 60 % higher Axial Rigidity !

Series 719/70 USSC, XH 719/70 USSC Single Row (paired in O- or X), 719/70 USOC, XH 719/70 as Double Row

Axial PreloadFv(N)

Radial RigidityRr(N/μm)

Axial RigidityRa(N/μm)

CRONIDEX®-Steel

Preload and RigidityUKF Spindle Bearings with Ceramic Balls (Hybrid Bearings)

15

17

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

100

110

120

130

140

150

3040

4050

6070

7080

70100

90120

100130

130170

130180

180240

190250

200250

250330

260340

270410

320430

370510

440540

470720

550730

670930

720940

8901100

USSC / USOCUSSC / USOC























d

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

UKF Type

100130

110150

180210

200240

220300

260350

290370

380500

400530

540720

560750

580760

7501000

7801020

8101260

9601280

11001520

13201620

14202140

16502200

20202780

21602880

26803240

200260

220310

360430

400470

440610

520700

580750

7601010

8001030

10401420

11201520

11601540

15001940

15602040

16202520

19202560

22003040

26403200

28404300

33004400

40405600

43205760

53606440

3337

3941

4849

5659

6166

7078

7884

9195

94102

109121

121127

127132

138150

144155

150161

167173

178196

127207

207236

230247

253265

265276

288299

4955

5860

6972

7985

9094

100105

112121

132138

138144

161173

184190

190190

201213

207224

219236

236247

259282

288299

299339

334357

362385

380403

414426

6269

6976

1892

100107

113121

127138

138150

161173

173184

196213

219230

224236

253270

265282

276293

299311

322357

357380

380362

420449

454483

477506

518535

132150

155167

196201

224236

247265

282316

316339

368385

380408

443477

483500

506523

558598

587627

610656

667690

725794

794840

840955

932989

10121081

10581116

11501196

201219

219242

276288

322345

362380

403449

449483

523552

552587

644690

690725

725759

805863

840219

874943

966989

10351139

11501219

12081369

13461426

14611553

15301622

16681714

253276

276305

351368

403431

454477

512569

564610

656702

702736

794863

874920

909955

10121081

10581139

11041196

12081242

13111438

14491518

15301725

16911794

18401955

19322047

21052162

L M S

XH USSC / USOCXH USSC / USOC























71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

L M SL M S

14 w w w. u k f . d e

2437 UKF 14-15 22.08.2013 12:30 Uhr Seite 2

Probedruck



2437 UKF 16-17 22.08.2013 12:29 Uhr Seite 1

Probedruck


nlimRPM

Speed Limit

Greaselubrication



Single/Double row,with fibre cage, preloaded,optimal contact angle, α = 21°;15°…25° upon request.

Calculation factors for MaximumSpeed Limit (Precision, Preload,Configuration)


Dimensions:XH USS similar Single Row Bearings Series 719/70XH USO similar to a pair Single Row Bearings 719/70

UKF Spindle Bearings of CRONIDEX® Steelwith Steel Balls (XH-Bearings)Series XH 719 USS, XH 719 USO

and XH 70 USS, XH 70 USO

28283232

30303535

37374242

42424747

47475555

55556262

62626868

68687575

72728080

80809090

85859595

7149

18

7141020

9181224

9181224

9181326

10201428

12241530

12241632

12241632

13261836

13261836

80000765007300069000

74000700006500062500

60000570005450052000

51000480004700045000

44000425004000037500

37000355003500033000

32500315003050030000

29500280002800027000

28000270002600024500

25000240002400022500

24000220002200021000

0,020,030,030,06

0,020,030,040,08

0,040,070,070,14

0,040,080,080,16

0,050,090,110,22

0,080,150,150,30

0,110,220,180,36

0,130,260,240,48

0,130,260,250,50

0,180,360,380,76

0,190,370,410,42

25,525,528,528,5

27,527,531,031,0

34,034,037,037,0

39,039,042,042,0

44,044,049,049,0

50,550,555,555,5

58,058,061,061,0

63,563,568,568,5

68,068,073,573,5

75,575,583,083,0

80,580,588,088,0

17,517,518,518,5

19,519,521,021,0

23,023,025,025,0

28,028,030,030,0

33,033,036,036,0

39,539,541,541,5

44,044,047,047,0

49,549,551,551,5

54,054,056,556,5

59,559,562,062,0

64,564,567,067,0

0,150,150,30,3

0,150,150,30,3

0,150,150,60,6

0,150,150,60,6

0,150,151,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

53000490004750045000

48000455004350041000

40000375003600034000

34000320003120029000

28800276002650026000

25500235002340022500

22000205002040019200

20000186001860017500

18600175001700016200

17000160001500014500

16000145001440013500

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

15151515

17171717

20202020

25252525

30303030

35353535

40404040

45454545

50505050

55555555

60606060

3100600042008300

3300660046009200

470094007400

14800

5700113009500

18900

6600132001160023100

10900217001550031000

12500249001580031600

14800296002230044600

15000300002580051500

21800436002800055900

24700494003100062000

9700174001340023100

10100179001550027900

14700265002270038600

15300277002810050600

16400296003090055700

26900483003860068300

28400510003890069500

28600515005420097400

302005440058400

104800

452008130059900

107700

481008650066400

119500

NC0

NCd D B

mm

UKF Type ra da Da

mm

m

kg

15

17

20

25

30

35

40

45

50

55

60

a

a

a

a

XH USO

D d

B

r

d

D

r

a

a

a

a

dD

B

d

r

D

r

XH USS

16 w w w. u k f . d e

2437 UKF 16-17 22.08.2013 12:29 Uhr Seite 2

Probedruck


single row f3 = 1,0

DT = 0,95

DB = 0,9

TBT = 0,75

QBC = 0,85



DB = 1,0

TBT ** = 0,9

QBC ** = 0,85

2DB = 0,8


nlimRPM

Speed Limit

Greaselubrication



65

70

75

80

85

90

100

110

120

130

140

150

9090

100100

100100110110

105105115115

110110125125

120120130130

125125140140

140140150150

150150170170

165165180180

180180200200

190190210210

210210225225

13261836

16322040

16322040

16322244

18362244

18362448

20402448

20402856

22442856

24483366

24483366

28563570

22200210002050018500

20000190001900018000

18500175001750017000

18000170001600015000

16500160001550014500

16000150001400013000

13500130001250012000

12000115001100010500

11500110001100010500

1100010500100009500

10000950095009000

9500900090008500

0,210,410,430,85

0,330,660,601,20

0,350,700,611,35

0,380,750,871,75

0,531,050,901,80

0,581,151,152,30

0,781,561,302,60

0,851,702,004,00

1,152,302,154,30

1,553,103,256,55

1,633,263,507,00

2,555,104,258,50

85,585,593,093,0

94,594,5

102,0102,0

99,599,5

107,0107,0

104,5104,5116,0116,0

114,5114,5121,0121,0

118,5118,5130,0130,0

132,0132,0140,0140,0

143,0143,0158,0158,0

151,0151,0168,0168,0

171,0171,0185,5185,5

181,5181,5195,5195,5

199,0199,0209,5209,5

69,569,572,072,0

75,575,578,078,0

80,580,583,083,0

85,585,589,089,0

92,592,594,094,0

96,596,5

100,0100,0

107,0107,0110,0110,0

117,0117,0122,0122,0

128,0128,0132,0132,0

139,0139,0144,5144,5

148,5148,5154,5154,5

161,0161,0165,5165,5

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,60,61,01,0

0,60,61,21,2

0,60,61,21,2

0,60,61,21,2

0,60,61,51,5

0,60,61,51,5

0,60,61,51,5

1,01,01,51,5

14500140001350013000

13500120001200011500

12000115001150011000

11500110001050010000

11000105001050010000

105001000095009000

9000850085008000

8000750075007000

7500700070006500

7000650065006000

6500600060005700

6000560058005300

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

USSUSOUSSUSO

65656565

70707070

75757575

80808080

85858585

90909090

100100100100

110110110110

120120120120

130130130130

140140140140

150150150150

25800515003300066000

33500670004400088000

35200704004690093800

370007390058300

116600

483009660066400

132800

5040010070079700

159400

6810013620090800

181600

71600143200115500231000

90700181300123600247200

109000218000159400318800

115500231000169300338600

153600307200205600411200

483008690068300

122900

6380011490090300

162500

6530011760093000

167400

66800120100119900204100

86100155000127100214600

89000158800155400263100

116600196600165100296700

115500205600216300360600

144700252000220500378600

174700314600286200512400

179600320300292100525800

241500392700367500596400

NC0

NCd D B

mm

UKF Type ra da Da

mm

m

kg


2437 UKF 18-19 22.08.2013 12:28 Uhr Seite 1

Probedruck


nlimRPM

Speed Limit

Greaselubrication



Single/Double row,with fibre cage, preloaded,optimal contact angle, α = 21°;15°…25° upon request.

Calculation factors for MaximumSpeed Limit (Precision, Preload,Configuration)


Dimensions:XH USSC similar Single Row Bearings Series 719/70XH USOC similar to a pair Single Row Bearings 719/70

UKF Spindle Bearings of CRONIDEX® Steelwith Ceramic Balls (“XH”-Hybrid Bearings)Series XH 719 USSC, XH 719 USOC

and XH 70 USSC, XH 70 USOC

28283232

30303535

37374242

42424747

47475555

55556262

62626868

68687575

72728080

80809090

85859595

7149

18

7141020

9181224

9181224

9181326

10201428

12241530

12241632

12241632

13261836

13261836

1072001024009760092800

99200944008800084800

81600768007360070400

68800656006400060800

60000576005440051200

51200488004720044800

44800432004160040000

40000384003840036800

38400368003520033600

33600320003200030400

32000304002960028000

0,010,030,030,05

0,020,030,040,07

0,030,060,060,13

0,040,070,070,14

0,040,080,100,19

0,070,130,130,26

0,100,190,160,32

0,110,230,210,42

0,110,230,220,45

0,160,320,330,67

0,160,310,350,70

25,525,528,528,5

27,527,531,031,0

34,034,037,037,0

39,039,042,042,0

44,044,049,049,0

50,550,555,555,5

58,058,061,061,0

63,563,568,568,5

68,068,073,573,5

75,575,583,083,0

80,580,588,088,0

17,517,518,518,5

19,519,521,021,0

23,023,025,025,0

28,028,030,030,0

33,033,036,036,0

39,539,541,541,5

44,044,047,047,0

49,549,551,551,5

54,054,056,556,5

59,559,562,062,0

64,564,567,067,0

0,150,150,30,3

0,150,150,30,3

0,150,150,60,6

0,150,150,60,6

0,150,151,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

70400656006320060000

64000600005760054400

52800496004800044800

44800424004160038400

38400368003520034400

33600312003120029600

28800272002720025600

26400248002480023200

24800232002240021600

22400208002000019200

20800192001920017600

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

15151515

17171717

20202020

25252525

30303030

35353535

40404040

45454545

50505050

55555555

60606060

1820364025205040

1960392028005600

2870574044808960

343068605740

11480

399079807000

14000

6580131609380

18760

7560151209590

19180

89601792013510

27020

9100182001561031220

13230264601694033880

14980299601876037590

6440116208960

15400

6720119001036018620

9800176401512025760

10220184801876033740

10920197402058037100

17920322002576045500

18900340202590046340

19040343003612064960

20160362603892069860

30100541803990071820

32060576804424079660

NC0

NCd D B

mm

UKF Type ra da Da

mm

m

kg

15

17

20

25

30

35

40

45

50

55

60

a

a

a

a

D d

B

r

d

D

r

XH USOC

a

a

a

a

dD

B

d

r

D

r

XH USSC

18 w w w. u k f . d e

2437 UKF 18-19 22.08.2013 12:28 Uhr Seite 2

Probedruck


nlimRPM

Speed Limit

Greaselubrication



65

70

75

80

85

90

100

110

120

130

140

150

9090

100100

100100110110

105105115115

110110125125

120120130130

125125140140

140140150150

150150170170

165165180180

180180200200

190190210210

210210225225

13261836

16322040

16322040

16322244

18362244

18362448

20402448

20402856

22442856

24483366

24483366

28563570

29600280002800025600

27200256002560024000

25600240002400023200

24000232002240020800

22400216002160020800

21600208002000019200

19200184001840017600

17600168001600015200

16000152001470014400

15000144001370013100

13600128001280012000

12800120001200011500

0,170,350,370,72

0,280,560,511,02

0,300,600,521,15

0,320,640,741,49

0,450,890,771,53

0,490,980,981,96

0,661,331,112,21

0,721,451,703,40

0,981,961,833,66

1,322,642,765,57

1,382,772,985,95

2,174,343,617,23

85,585,593,093,0

94,594,5

102,0102,0

99,599,5

107,0107,0

104,5104,5116,0116,0

114,5114,5121,0121,0

118,5118,5130,0130,0

132,0132,0140,0140,0

143,0143,0158,0158,0

151,0151,0168,0168,0

171,0171,0185,5185,5

181,5181,5195,5195,5

199,0199,0209,5209,5

69,569,572,072,0

75,575,578,078,0

80,580,583,083,0

85,585,589,089,0

92,592,594,094,0

96,596,5

100,0100,0

107,0107,0110,0110,0

117,0117,0122,0122,0

128,0128,0132,0132,0

139,0139,0144,5144,5

148,5148,5154,5154,5

161,0161,0165,5165,5

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,30,31,01,0

0,60,61,01,0

0,60,61,21,2

0,60,61,21,2

0,60,61,21,2

0,60,61,51,5

0,60,61,51,5

0,60,61,51,5

1,01,01,51,5

19200184001760016800

17600160001600015200

16000152001520014400

15200144001440013600

14400136001360012800

13600128001280012000

12000112001200011200

1120010400104009600

10400960096009200

9600880089008000

8800800083007600

8000720076007000

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

USSCUSOCUSSCUSOC

65656565

70707070

75757575

80808080

85858585

90909090

100100100100

110110110110

120120120120

130130130130

140140140140

150150150150

15610312202002040040

20300406002667053340

21350427002842056840

22400448003535070700

29260585204025080500

30520610404830096600

413008260055020

110040

434008680070000

140000

54950109900

74900149800

6608013216096600

193200

70000140000102620205240

93100186200124600249200

32200579604550081900

425607658060200

108360

435407840062020111580

445208008079940

136080

5740010332084700

143080

59360105840103600175420

77700131040110040197820

77000137060144200240380

96460168000147000252420

116480209720190820341600

119700213500194740350560

161000261800245000397600

NC0

NCd D B

mm

UKF Type ra da Da

mm

m

kg

single row f3 = 1,0

DT = 0,95

DB = 0,9

TBT = 0,75

QBC = 0,85



DB = 1,0

TBT ** = 0,9

QBC ** = 0,85

2DB = 0,8



2437 UKF 20-21 22.08.2013 12:27 Uhr Seite 1

Probedruck


UKF High Speed Spindle BearingsSeries 719 UHS, 70 UHS

PreloadGap

PreloadGap

High Speed Spindle Bearings

For higher spindle speeds (HSC, HSM), bearings withsmaller balls and profiles provide both reduced internalstresses due to the reduced centrifugal forces acting onthe outer ring, and up to 40% higher maximum speeds.Conversely, total load capacity (C) is somewhat reduced.However, the resulting higher number of balls also yieldsincreased rigidity, while the stronger cross-sections providehigher stability to both the inner and outer rings of thebearing.

Retainers are made of premium fibre,and fully capture and guide the bearing’sballs. In turn, the retainer follows theinner edge of the outer ring. Retainersmade of other materials, including PEEK,can also be furnished at extra cost, uponrequest. Also available, inner rings withone shoulder set back to facilitatelubricant feed and distribution (centrifugal effect).

For these high-speed bearings, the customary contactangle is 15°, but UKF also offers 25° for applicationsrequiring higher axial stiffness. Other angles, rangingfrom 12° to 30° are also available.

Dimensions are in accordance with Series 719…, 70…,or the Dimensional Series 19, respectively 10,→ Table “Bearing Seats”. Bearings of the 719 Series featuresmaller cross-sections allowing a larger diameter shaftto be used, while retaining the same housing dimensions.Bearings in accordance with the 718 Series are availableupon specific inquiry and agreement.

Distance rings, which are used as design and assemblyelements to increase axial offset are also helpful insupplying lubricants to the bearings. In the case of greaselubrication, this can also serve as a reservoir for additionallubricant.

Options:

Lubrication feed, through the outer ring, directly into theraceway.→ S. 28

Bearings with integral shields → S. 28

Pre-lubricated bearings; packed with proven high-performance grease; filled with the exact quantity - sobearing is ready for installation → S. 50

higher Speed Limits

and Rigidity,

modified Load Capacity,

stronger Cross-Sections

Distance Ring implementing lubrication oil → S. 57

20 w w w. u k f . d e

2437 UKF 20-21 22.08.2013 12:27 Uhr Seite 2

Probedruck


Seat Dimensions Mass

Series 719/70 UHS and 719/70 UHC,

also in accordance with Dimensional Series 19, 10

Dimensions and weights

Nominal Size

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

100

110

120

130

140

150

3742

4247

4755

5562

6268

6875

7280

8090

8595

90100

100110

105115

110125

120130

125140

140150

150170

165180

180200

190210

210225

912

912

913

1014

1215

1216

1216

1318

1318

1318

1620

1620

1622

1822

1824

2024

2028

2228

2433

2433

2835

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

71970

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

UH.UH.

2020

2525

3030

3535

4040

4545

5050

5555

6060

6565

7070

7575

8080

8585

9090

100100

110110

120120

130130

140140

150150

d D B

mm

UKF Type De

mm

kg

Seat Dimensions for UKFHigh Speed Spindle Bearings

26,128,3

31,133,3

36,139,2

42,744,6

48,250,7

53,856,0

58,261,0

64,368,2

69,473,3

74,578,3

81,484,7

86,489,7

91,596,8

97,8101,9

102,9109,0

114,9119,0

124,9132,6

136,9142,6

148,5156,3

158,5166,3

172,8177,9

1,401,75

1,351,75

1,351,90

1,501,90

1,751,90

1,802,00

1,852,00

2,202,35

2,102,45

2,052,45

2,252,90

2,252,90

2,353,25

2,703,25

2,803,60

2,953,60

3,004,55

3,204,37

3,755,35

3,755,35

4,606,00

0,500,80

0,500,80

0,501,30

0,801,30

0,801,30

0,801,30

0,801,30

1,301,40

1,301,40

1,301,40

1,301,40

1,301,40

1,301,40

1,301,40

1,401,80

1,401,80

1,402,40

1,402,40

1,402,40

1,402,40

1,402,40

23,025,0

28,030,0

33,036,0

39,541,5

44,047,0

49,551,5

54,056,5

59,562,0

64,567,0

69,572,0

75,778,0

80,583,0

85,589,0

92,594,0

96,5100,0

110,0110,0

117,0122,0

128,0132,0

139,0144,5

148,5154,5

161,0165,5

34,037,0

39,042,0

44,049,0

50,555,5

58,061,0

63,568,5

68,073,5

75,583,0

80,588,0

85,593,0

94,5102,0

99,5107,0

104,5116,0

114,5121,0

118,5130,0

132,0140,0

143,0158,0

157,0168,0

171,0185,5

181,5195,5

199,0209,5

0,040,08

0,040,09

0,050,12

0,080,16

0,120,19

0,140,26

0,140,27

0,190,41

0,200,44

0,220,46

0,360,65

0,390,72

0,410,94

0,570,97

0,621,24

0,821,40

0,912,16

1,242,32

1,673,51

1,763,78

2,754,59

0,040,07

0,040,08

0,050,11

0,070,15

0,110,18

0,130,24

0,130,25

0,180,38

0,190,41

0,210,43

0,340,61

0,360,67

0,380,88

0,530,91

0,581,16

0,771,31

0,852,02

1,162,17

1,563,28

1,653,53

2,574,29

UHSUHC

XH UHC

s ra da Da

d

ra

D

D

a

a

e

B

D

d

s

ra


2437 UKF 22-23 22.08.2013 12:24 Uhr Seite 1

Probedruck


Single Row, with fibre cage,preloaded,Angle of Contact α: A15 = 15°, A25 = 25°

Calculation Factors for Speed Limit(Precision, Preload, Configuration)


Dimensions of Series 719/70

nlimRPM

Speed Limit

Greaselubrication


Ratings Rigidity N/μmaxialPreload L

Nominal Size

UKF High Speed Spindle BearingsSeries 719 UHS and 70 UHS

37374242

42424747

47475555

55556262

62626868

68687575

72728080

80809090

85859595

9090

100100

100100110110

99

1212

99

1212

99

1313

10101414

12121515

12121616

12121616

13131818

13131818

13131818

16162020

88070743907935067100

74930632806833057780

65190550605788048940

55780471105072042890

49220415704556038520

44420375204100034670

41150347503785032000

37190314103393028690

34620292403174026840

32390273502982025210

29530249402733023110

59010498405317044960

50200424004578038710

43680368903878032790

37370315603398028740

32980278503053025810

29760251402747023230

27570232802536021440

24920210502273019220

23200195902127017980

21700183201998016890

19790167101831015480

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

20202020

25252525

30303030

35353535

40404040

45454545

50505050

55555555

60606060

65656565

70707070

3300315051804920

3900371059105610

4490423077807850

6230591089509460

8500807011010

10450

93108840

1539014620

97209230

1782016920

17410165301960018620

17010161502170020610

17820169202185020750

23490223103061029070

5160489068926540

5490518074307040

5780545084509670

60705830

1082010210

87008200

1098010350

90108490

1451013700

93508830

1475013950

12210114801824017230

12320115701858017440

12730119901875017690

16380154302698025470

NC0

NCd D B

mm

UKF Type

Fv NRa

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

40655080

50806095

609570

110

7011080

130

8013090

145

90145120195

100165130210

130210170275

140230180295

150245190310

170275230375

21562464

26692874

31823387

359338

101

3810140

106

4110947

125

4411750

133

5113556

148

5514660

159

5915664

160

6416071

188

145128160141

167147185163

200176215189

224197252222

256225262231

281247313275

296260325286

335295379333

363319394347

388341421370

424373472415

Rr

20

25

30

35

40

45

50

55

60

65

70

a

a

a

UHS

dD

B

d

D

r

ar

22 w w w. u k f . d e

2437 UKF 22-23 22.08.2013 12:24 Uhr Seite 2

Probedruck


Rigidity N/μm

Greaselubrication


nlimRPM

Speed LimitRatings axialPreload L axial radial


Nominal Size

Single Row, with fibre cage,preloaded,

Contact Angle α: A15 = 15°, A25 = 25°

105105115115

110110125125

120120130130

125125140140

140140150150

150150170170

165165180180

180180200200

190190210210

210210225225

16162020

16162222

18182222

18182424

20202424

20202828

22222828

24243333

24243333

28283535

27890235602589021890

26420223202400020290

24490206802288019350

23350197202139018090

20920176701968016640

19310163101757014860

17610148801640013870

16190136801491012610

15210128501406011890

13940117801312011090

18690157901735014670

17700149501608013590

16410138601533012960

15640132101433012120

14020118401319011150

1294010930117709960

118009970

109909290

10850917099908450

10190861094207970

9340789087907430

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

UHSUHSUHSUHS

75757575

80808080

85858585

90909090

100100100100

110110110110

120120120120

130130130130

140140140140

150150150150

24700234603240030780

25920246204090038850

33610319204657044240

35230334605589053090

47790454006358060400

50220477008100076950

63580604008667082330

7492071170

110640105100

8100076950

118260112340

107730102340178000169100

16530155602747025800

16720157303221030240

24700232403271030700

25000235303762036570

30250284703926036940

31000291805694053450

37040348605883055310

47570447807963074890

48880460008030075650

62910592109688089890

NC0

NCd D B

mm

UKF Type

Fv NRa

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

180295240390

190310290475

220360300490

260425360585

310505380620

330535500815

390635510830

470765650

1060

500815660

1070

6201010770

1250

6717874

196

7219182

217

7720485

225

8322094

249

91241100265

100265113299

109289120318

119315133352

124329136360

140371146387

448394488429

471414545480

511450564496

554488633557

610537664684

657578741652

729642785691

784690876771

815717903795

929818970854

Rr

75

80

85

90

100

110

120

130

140

150

Single Row f3 = 1,0

DT = 0,95

DB = 0,9

TBT = 0,75

QBC = 0,85

Bearing Sets and Calculation Factor f3 for Speed Limit


2437 UKF 24-25 22.08.2013 12:24 Uhr Seite 1

Probedruck


Single Row, with fibre cage,

preloaded,


Calculation Factors for Speed Limit(Precision, Preload, Configuration)



Greaselubrication


nlimRPM

Speed LimitRatings Rigidity N/μmaxialPreload L axial radial

Nominal Size

UKF High Speed Spindle Bearingswith Ceramic Balls (Hybrid-Bearings)Series 719 UHC and 70 UHC

37374242

42424747

47475555

55556262

62626868

68687575

72728080

80809090

85859595

9090

100100

100100110110

99

1212

99

1212

99

1313

10101414

12121515

12121616

12121616

13131818

13131818

13131818

16162020

105680892709522080520

89920759408200069340

78230660706946058730

66940565306086051470

59060498805467046220

53300450204920041600

49380417004542038400

44630376904072034430

41540350903809032210

38870328203578030250

35440299303280027730

70810598106380053950

60240508805494046450

52420442704654039350

44840378704078034490

39580334203664030970

35710301703296027880

33080279403043025730

29900252602728023060

27840235102552021580

26040219802398020270

23750200502197018580

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

20202020

25252525

30303030

35353535

40404040

45454545

50505050

55555555

60606060

65656565

70707070

1820173028502710

2150204032503090

2470233042804320

3430325049205200

4680444060605750

5120486084608040

5350508098009310

95809090

1078010240

93608880

1194011340

98009310

1249011860

12920122701684015990

3610342048204580

3840363052004930

4050382059206770

4250408075707150

6090574076907250

63105940

101609590

65506180

103309770

85508040

1277012060

86208100

1301012210

89108390

1313012380

11470108001889017830

NC0

NCd D B

mm

UKF Type

Fv NRa

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

40655080

50806095

609570

110

7011080

130

8013090

145

90145120195

100165130210

130210170275

140230180295

150245190310

170275230375

24642874

30793285

369438

100

4010744

116

4411646

122

4712554

144

5113558

153

5915564

170

6316869

183

68179

74184

7418482

216

167147184162

192169213187

230202247217

258227290255

294259301266

323284360316

340299374329

385339436383

417367453399

446392484426

488429543477

Rr

20

25

30

35

40

45

50

55

60

65

70

a

a

a

UHC

dD

B

d

D

r

ar

24 w w w. u k f . d e

2437 UKF 24-25 22.08.2013 12:24 Uhr Seite 2

Probedruck


Greaselubrication


nlimRPM


Nominal Size




75

80

85

90

100

110

120

130

140

150

105105115115

110110125125

120120130130

125125140140

140140150150

150150170170

165165180180

180180200200

190190210210

210210225225

16162020

16162222

18182222

18182424

20202424

20202828

22222828

24243333

24243333

28283535

33470282703107026270

31700267802880024350

29390248202746023220

28020236602567021710

25100212002362019970

23170195702108017830

21130178601968016640

19430164201789015130

18250154201687014270

16730141401574013310

22430189502082017600

21240179401930016310

19690166301840015550

18770158501720014540

16820142101583013380

15530131201412011950

14160119601319011150

13020110001199010140

1223010330113009560

112109470

105508920

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

7197197070

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

75757575

80808080

85858585

90909090

100100100100

110110110110

120120120120

130130130130

140140140140

150150150150

13590129001782016930

14260135402250021370

18490175602561024330

19380184003074029200

26280249703497033220

27620262404455042320

34970332204767045280

41210391406085057810

44550423206504061790

59250562909790093010

11570108901923018060

1170011010

2255021170

17290162702290021490

17500164702633026010

21180199302908027620

21700204303986037420

259302440041180

38720

33300313505574052420

34220322005621052960

44040414506782062920

NC0

NCd D B

mm

UKF Type

Fv NRa

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

180295240390

190310290475

220360300490

260425360585

310505380620

330535500815

390635510830

470765650

1060

500815660

1070

6201010770

1250

77205

85225

83220

94250

89235

98259

95253108286

105277115305

115305130344

125332138366

137362153405

143378156414

161427168445

515453561493

542476627552

588518649570

637561728641

702618764672

756665852750

838738903795

902794

1007887

937825

1038914

1068941

1116982

Rr

Single Row f3 = 1,0

DT = 0,95

DB = 0,9

TBT = 0,75

QBC = 0,85



2437 UKF 26-27 22.08.2013 12:26 Uhr Seite 1

Probedruck


Greaselubrication


nlimRPM


Nominal Size

Single Row, with fibre cage,

preloaded,


Calculation Factors for Speed Limit(Precision, Preload, Configuration)� Calculation Principles

UKF-High Speed Spindle Bearingsof CRONIDEX® Steel with Ceramic Balls(XH Hybrid Bearings)Series XH 719 UHC and XH 70 UHC


37374242

42424747

47475555

55556262

62626868

68687575

72728080

80809090

85859595

9090

100100

100100110110

99

1212

99

1212

99

1313

10101414

12121515

12121616

12121616

13131818

13131818

13131818

16162020

12154010266010950092600

103400873309430079740

89960759807987067540

76980650106999059190

67920573706287053160

61300517805658047840

56790479605223044160

51320433504682039590

47780403504380037040

447003774041150

34790

40750344203772031890

81430687807337062040

69280585106318053420

60280509105352045250

51570435504689039660

45510384304213035620

41070346903791032060

38050321303500029590

34390290503137026520

32020270302935024810

29950252802757023310

27310230602527021360

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

20202020

25252525

30303030

35353535

40404040

45454545

50505050

55555555

60606060

65656565

70707070

2360225037003520

2790265042304010

3210302055605610

4450423070106760

6080577078707470

66606320

1100010450

69506600

1274012100

12450118201401013310

12160115501552014740

12740121001562014840

16800159502189020790

7220685096509160

76907250

104009860

80907630

1183013540

85008160

1515014290

12180114801537014490

12610118902031019180

13090123602065019530

17090160702554024120

17250162002601024420

17820167902625024770

22930216003777035660

NC0

NCd D B

mm

UKF Type

Fv NRa

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

40655080

50806095

609570

110

7011080

130

8013090

145

90145120195

100165130210

130210170275

140230180295

150245190310

170275230375

24642874

30793285

369438

100

4010744

116

4411646

122

4712554

144

5113558

153

5915564

170

6316869

183

6817974

184

7418482

216

167147184162

192169213187

230202247217

258227290255

294259301266

323284360316

340299374329

385339436383

417367453399

446392484426

488429543477

Rr

20

25

30

35

40

45

50

55

60

65

70

a

a

a

XH UHC

dD

B

d

r

D

ar

26 w w w. u k f . d e

2437 UKF 26-27 22.08.2013 12:26 Uhr Seite 2

Probedruck





Greaselubrication


nlimRPM


Nominal Size

105105115115

110110125125

120120130130

125125140140

140140150150

150150170170

165165180180

180180200200

190190210210

210210225225

16162020

16162222

18182222

18182424

20202424

20202828

22222828

24243333

24243333

28283535

38490325103573030210

36460308003312028000

33800285403157026700

32220272102952024960

28870243802716022960

26650225102425020510

24300205302263019140

22340188802058017400

20990177301940016410

19240162601811015300

25790217902394020240

24430206302219018750

22650191302116017880

21580182301978016730

19350163401820015390

17860150801624013740

16280137601517012820

14970126501379011660

14060118801300011000

12890108901213010250

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

XH 719XH 719XH 70XH 70

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

UHCUHCUHCUHC

75757575

80808080

85858585

90909090

100100100100

110110110110

120120120120

130130130130

140140140140

150150150150

17660167702317022010

18530176002924027780

24030228203330031630

25190239203996037960

34170324604546043190

3591034110

5792055020

45460431906197058870

53570508907911075150

57920550208456080320

7703073170

127270120910

23140217803846036120

23410220204509042340

34580325404579042980

35000329405267051200

42350398605816055250

43400408507972074830

51860488008236077430

6660062690111480104850

6843064400

112420105910

8807082890

135630125850

NC0

NCd D B

mm

UKF Type

Fv NRa

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

A15A25A15A25

180295240390

190310290475

220360300490

260425360585

310505380620

330535500815

390635510830

470765650

1060

500815660

1070

6201010770

1250

7720585

225

8322094

250

8923598

259

95253108286

105277115305

115305130344

125332138366

137362153405

143378156414

161427168445

515453561493

542476627552

588518649570

637561728641

702618764672

756665852750

838738903795

902794

1007887

937825

1038914

1068941

1116982

Rr

Single Row f3 = 1,0

DT = 0,95

DB = 0,9

TBT = 0,75

QBC = 0,85

75

80

85

90

100

110

120

130

140

150



2437 UKF 28-29 22.08.2013 12:25 Uhr Seite 1

Probedruck


UKF Spindle Bearings – Options

Shields

Certain bearings are available with optional, factory-installed shields. These bearings are also pre-lubricatedwith the appropriate type and quantity of grease, and areready for installation. In general, these bearings need noadditional lubricants during their service life. Shields areprovided on both sides, and are fixed in the Outer Ring.The shields are made of a special, exceptionally stabileplastic, which is resistant to most lubricants and againsttemperatures up to 80°C (180°F). The shields are non-contacting with the Inner Ring, and do not add any frictionload to the bearing.Shield designation: “2Z”, for ex. 719 UHC 50.A15.2Z.O/I.L

Lubrication

As an alternative to an axial lubricant supply using, forexample a distance ring (→ Distance Ring), lubricant canbe supplied radially, directly through the Outer Ring intothe raceway.The bearing is specially configured with an annular groovein the Outer Ring, which distributes the lubricant to severalradial bores. Additional grooves for O-ring seals areprovided to prevent unwanted lubricant migration.Lubricant feed designator: “LB” (lubrication bore), for ex.719 UHS 50.A15.LB.O/I.L

Variable Preload

A bearing’s preload determines both the performance ofthe spindle, as well as the quality of the product. Heavypreloads increase the rigidity of the bearing set; lightpreloads enable higher operating speeds.

On modern Machine Tools, especially Machining Centres,expanded speed ranges are often required to meetproductivity expectations. So, on the one hand, highrigidity for the working forces is required, on the otherhand high speeds for efficient High Speed Cutting isneeded.

The UKF VARIORING System varies the preload of a bearingfrom “light” to “medium” and “heavy”. This permits thehighest possible RPM, or high rigidity (stiffness),respectively, corresponding to the varying requirementsof the metal cutting operation. Only with bearings, whosepreload can be dynamically altered during operation, cana process or operation be fully optimized. Starting pointis normally a light preload.

UKF System VARIORINGHydraulic pressure is applied to a groove machined intothe outer ring of the bearing. Parallel O-ring grooves sealthe housing against the bearing ring, so that pressurecan be used to increase or decrease the effective fit, andinternal clearances of the bearing. The feature is applicableto any normal, double-row Spindle Bearing; usually withlight preload. No additional parts; no axial displacementof the shaft.

Type Series 718Bearings in accordance with these dimensions are availableon special order, and are subject to minimum orderrequirements.

p

28 w w w. u k f . d e

2437 UKF 28-29 22.08.2013 12:25 Uhr Seite 2

Probedruck



2437 UKF 30-31 22.08.2013 12:21 Uhr Seite 1

Probedruck


UKF Angular Contact Ball Bearings with Spacer Balls(rolling ball guidance) double row, preloaded – Series K, UK, UL, UM

Form factor according to DIN 628 part 5Rolling contact without sliding frictionBetween the two rows of load carrying balls, a third rowof row of smaller Spacer- or Guide-Balls, roll on a separateinternal bearing ring. The result is a bearing with onlyrolling friction at the load carrying balls—no tribologicallyadverse sliding friction resulting from a rigid cage! Thespace-saving effect of this unique design enables tworows of balls to occupy the same spaceas a comparably sized single row bearingbut with even more balls in each row!

Load Capacity and LifetimeThese bearings carry both radial and axialloads, and provide spherical contact ofthe balls (DF). This configuration providesa slight self-aligning preload; conse-quently, the balls remain under equal preload. The fullball complement also provides more load carrying pointsfor improved load capacity and lifetime.

Fig. 1: The inner ring has two races, Li1 and Li2; similarly,La1 and La2, are the outer races, formed by two rings,A1 and A2, which are locked together by the securityrings, V, fitted into machined grooves.

Fig. 2: When the inner ring rotates in direction of thearrow, the load carrying balls, T, follow in the samedirection and rotate as shown in the figure. In this example,the Spacer Balls, t, respectively, revolve around their axisas shown, due to their contact with the load-carryingballs. Similarly, the Guidance Ring, F, follows the guideballs, as shown.

Fig. 3: The load-carrying balls, T, are configured in twoparallel raceways (R1 and R2). However, instead of a rigidretainer, a third row of Spacer Balls simultaneously, GuideBalls, t maintains separation and guides the load carryingballs. The independently rotating Guidance ring, F, en-compasses the Spacer Balls and provides a preload. Thedesign is self-compensating, maintaining the preload

of the bearings!

The design is resistant to both the causesand the effects of wear. The bearings arefactory preloaded, and are ready for in-stallation without any further adjustment.

Dimensions are in accordance with di-mensional series 10, 20, 02, 03 / bearingseries 70, 72, 73. The K series bearings

are particularly advantageous, featuring a space savingd/D, when compared to the dimension series 10/bearingseries 70. Two rows within the dimensions of a singlerow bearing !

Accuracy is according to precision classes P5/ABEC 5…P2/ABEC 9, and even better with UKF-precision 0/0,respectively, HQ (see Running Precision).The cageless design (no rigid retainer) provides reducedwear, yielding longer running lifetimes while maintaininghigher running precision.

Bearings K/UK: Dimensions in accordance with Series 70

Bearings UL: Dimensions in accordance with Series 72

Bearings UM: Dimensions in accordance with Series 73

Reliable precision over along lifetime,

many load carrying balls,

ideal Spindle Bearing forheadstocks

30 w w w. u k f . d e

Figure 1

Figure 2 Figure 3

2437 UKF 30-31 22.08.2013 12:21 Uhr Seite 2

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nlimRPM

Speed Limit

Greaselubrication



C0 Cd D B UKF Type

N Nmm

ra da Da

mm

m

kg

40

42

47

55

60

62

67

68

72

75

80

85

90

92

95

100

105

110

110

115

120

125

125

130

135

140

140

145

150

160

170

175

180

195

210

225

235

250

260

280

300

14

14

15

16

17

17

18

18

19

19

20

21

22

22

22

23

24

24

25

24

26

27

28

27

30

30

32

30

34

36

38

39

40

40

42

45

48

52

52

55

58

8500

8500

7000

6000

5500

5500

5000

5000

4500

4500

3800

3600

3600

3400

3400

3000

2800

2800

2600

2600

2500

2500

2400

2400

2200

2200

2000

2000

1900

1800

1600

1500

1450

1300

1200

1150

1000

950

950

900

850

0,080

0,095

0,118

0,168

0,200

0,220

0,225

0,270

0,290

0,335

0,380

0,435

0,550

0,510

0,585

0,655

0,720

0,840

0,860

0,895

1,000

1,210

1,165

1,310

1,495

1,610

1,665

1,710

2,080

2,590

3,150

3,345

3,565

4,130

5,000

6,180

6,970

8,550

9,000

12,000

14,000

34

36

41

48

53

55

59

60

64

67

72

75

80

82

85

90

95

100

100

105

108

113

113

118

123

128

126

131

136

146

156

161

166

181

194

209

219

230

240

260

280

26

26

33

37

42

42

48

48

53

53

58

65

65

70

70

75

80

80

85

85

92

92

97

97

102

102

109

109

114

119

124

129

134

144

156

166

176

190

200

210

220

0,6

0,6

0,6

0,6

0,6

0,6

0,6

0,6

0,6

0,6

0,6

0,8

0,8

0,8

1,0

1,0

1,0

1,0

1,0

1,0

1,0

1,0

1,0

1,0

1,0

1,0

1,3

1,3

1,3

1,3

1,5

1,5

1,5

1,5

1,5

1,8

1,8

1,8

1,8

1,8

2,0

7000

7000

6000

5000

4500

4500

4000

4000

3500

3500

3200

3000

3000

2800

2800

2500

2300

2300

2200

2200

2100

2100

2000

2000

1800

1800

1700

1700

1600

1500

1300

1250

1200

1100

1000

950

850

800

800

750

700

K

UK

K

K

K

UK

K

UK

K

UK

K

K

UK

K

UK

K

K

UK

K

UK

K

UK

K

UK

K

UK

K

UK

K

K

K

K

K

K

K

K

K

K

K

K

K

20

20

25

30

35

35

40

40

45

45

50

55

55

60

60

65

70

70

75

75

80

80

85

85

90

90

95

95

100

105

110

115

120

130

140

150

160

170

180

190

200

9600

10200

13000

17300

20300

21300

24700

24700

27000

29500

32400

35000

41500

43500

46500

50500

52500

62500

56500

64800

67000

69500

72000

72000

89000

92000

89000

92000

109000

127000

136000

141000

146000

178000

201000

225000

241000

274000

287000

356000

401000

13300

13800

16900

21100

24400

25000

28400

28400

29900

33100

34600

36000

43200

44200

48000

50000

50800

60600

52200

61800

62400

63600

64800

64800

80400

82100

79200

81600

98400

113000

120000

121000

124000

148000

164000

182000

188000

214000

215000

271000

306000

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

115

120

130

140

150

160

170

180

190

200

Series K, UK

Dimensions: K = manufacturer’s standard UK = dimensional series 20 (d and D like Bearing Series 70)

Double Row, with rolling ball guidance (Spacer Balls),preloaded, Contact Angle α = 16°

a

a

ad

D

B

d

D

r

ar


2437 UKF 32-33 22.08.2013 12:21 Uhr Seite 1

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nlimRPM

Speed Limit

Greaselubrication



C0 Cd D B UKF Type

N Nmm

ra da Da

mm

m

kg

Dimensions: UL like Bearings of Series 72 UM like Bearings of Series 73

Double Row, with rotating Spacer Ballspreloaded,Contact Angle α = 16°

Series UL, UM

35

40

47

47

52

52

62

62

72

72

80

80

90

85

100

90

110

100

120

110

130

120

140

125

150

130

160

140

170

150

160

170

180

190

200

215

11

12

14

14

15

15

17

16

19

17

21

18

23

19

25

20

27

21

29

22

31

23

33

24

35

25

37

26

39

28

30

32

34

36

38

40

8500

8000

7000

7500

7000

6500

6000

5500

5000

5000

4500

4300

3800

3800

3400

3500

3100

3200

2900

3000

2800

2800

2400

2500

2300

2400

2200

2300

2100

2200

1900

1800

1700

1600

1400

1200

0,050

0,080

0,135

0,115

0,170

0,145

0,260

0,230

0,400

0,320

0,530

0,425

0,730

0,485

0,980

0,540

1,280

0,695

1,650

0,930

2,050

1,150

2,540

1,250

3,100

1,400

3,700

1,740

4,440

2,070

2,610

3,200

3,880

4,000

5,000

6,400

30

34

40

41

44

46

54

55

64

64

70

72

80

77

90

82

98

90

108

100

116

110

126

115

136

120

146

128

154

138

148

156

166

176

186

201

20

21

24

26

28

32

33

37

38

43

45

48

50

53

55

58

62

65

67

70

74

75

79

80

84

85

89

92

96

97

102

109

114

119

124

134

0,60

0,60

1,00

0,60

1,00

0,60

1,00

0,60

1,00

0,60

1,00

0,60

1,20

0,60

1,20

0,60

1,50

0,80

1,50

0,80

1,50

0,80

1,80

0,80

1,80

0,80

2,00

1,00

2,00

1,00

1,30

1,30

1,30

1,50

1,50

1,50

UL

UL

UM

UL

UM

UL

UM

UL

UM

UL

UM

UL

UM

UL

UM

UL

UM

UL

UM

UL

UM

UL

UM

UL

UM

UL

UM

UL

UM

UL

UL

UL

UL

UL

UL

UL

15

17

17

20

20

25

25

30

30

35

35

40

40

45

45

50

50

55

55

60

60

65

65

70

70

75

75

80

80

85

90

95

100

105

110

120

7800

12200

14200

14200

16500

17600

23000

23000

31100

29200

38500

34700

49500

40900

58500

45500

73000

52800

84500

61000

97000

69500

71000

76000

132000

83000

148000

93800

165000

110000

126000

144000

157000

176000

186000

219000

11500

14400

19600

19600

22300

23400

29800

28700

38400

34400

46200

39500

57000

45000

66600

49600

79800

55800

91200

62200

103000

69000

116000

75000

134000

80400

148000

88700

163000

102000

116000

131000

143000

148000

167000

193000

7000

6800

6100

6300

5700

5400

4900

4500

4100

4100

3700

3600

3200

3200

2800

2900

2600

2700

2400

2500

2300

2300

2000

2100

1900

2000

1800

1900

1700

1800

1600

1500

1400

1300

1200

1000

15

17

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

a

a

a

adD

B

r

d

D

r

32 w w w. u k f . d e

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2437 UKF 34-35 22.08.2013 12:20 Uhr Seite 1

Probedruck


0 250 500 1000 2000 4000 N

20μm

15

10

5

K 20UL 20

K 50

UL 50

K 100UL 100

80μm70

60

50

40

30

20

10

0 250 500 1000 2000 4000 N

K 20

UL 20

K 50UL 50

K 100UL 100

Elasticity and Rigidity

The following examples depict the effects of these twoproperties, relative to changes in load and bearing size,in this example light or medium bearings (K, UL) and amedium preload:

Elasticity – radial deflection of preloaded bearings(displacement in μm; load in N)

Handling and Assembly

The bearings are furnished ready for installation; theirpreload is preset at the factory. Assembly only requiresthat the bearings are pushed into place by hand, andthen secured. No adjustment for the preload is needed.(Also, see Mounting Instructions).

In the event a bearing must be washed, cleanup is easybecause all of the parts are in rolling contact. There areno rigid cages to interfere with cleaning.

Calculation Example(Also see Calculation Principles)Determine the nominal lifetime Lh in hours, for a bearingtype K 50.The bearing runs under radial forces of Fr = 2500 N andaxial forces Fa = 1000 N, speed is n = 1000 RPM

Ratings: Static Co = 32400 NDynamic C = 34600 NSpeed Factor fn = 0,322

Calculate, as follows:2 · Fa =

2 · 1000 N = 0,062

i · Co 1 · 32400 N

The result is the limiting value to chosethe factors X and Y: e = 0,43

Fa = 1000 N

= 0,40 < eFr 2500 N

X = 1 Y= 1,46

The dynamic equivalent load is therefore:P = X · Fr + Y · Fa = 1 · 2500 N + 1,46 · 1000 = 3960 N

Now the value for the dynamic load can be found:

fL = C

· fn

= 34600 N · 0,322

= 2,81 P 3960 N

This yields a nominal lifetime of Lh = 11000 h.

UKF Angular Contact Ball Bearings

Elasticity – axial deflection of preloaded bearings(displacement in μm; load in N)

D e s i g n E xa m p l e s

Bearing Arrangement, Cut-off Saw Spindle

34 w w w. u k f . d e

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Design Examples

High Frequency Turning Spindle designed with Spindle Bearings USS and USO

Surface Grinding Spindle using sealed High Speed Spindle Bearings UHS “2Z”

HSC-Spindle fitted with Spindle Bearings designed for direct lubrication “LB”


2437 UKF 36-37 22.08.2013 12:20 Uhr Seite 1

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Design Example

UKF Spindle Bearings for axially expanding shafts- Floating Bearing “AF..” with Ceramic Balls (Hybrid Bearings)

- Series 70 AFSC Single Row, 70 AFDC Double Row

The axial displacement permitted by a floating designposes special design considerations. Special attentionmust be given to the overall design in order to maximizethe performance of the floating bearing. Particularlyadvantageous is the application of a double row bearing,consisting of an outer assembly from an UKF USO bearing.This provides superior support, rigidity, and slidingcharacteristics.

Therefore, a double-row bearing with a cylindrical innersleeve was designed. The axial compensation is accom-plished entirely within the bearing itself, by allowing theInner Ring to slide relative to the outer assembly. Theseat in the housing remains unchanged. The bearingscan be produced with ceramic balls for high speeds; forlonger lifetimes with CRONIDEX®-steel inner rings, com-bined with stabile support of the shaft (two raceways anda one-part Outer Ring resist tilting). A conical bore providesa simple built-in adjustment; simply push onto the shaftuntil seat is tight, and free of play.

Single Row Design AFSCfor lower loads and high speeds

Options: Shields (2Z) with Grease Lubrication for life→ page 28

Direct Lubrication (LB)to the Outer Ring races→ page 28

At lower speed it is possible to

fit the bearings with steel balls.

100 Cr 6

CRONIDEX

N4Si3

Floating Bearing “AFDC”

70 AFDC double row

70 AF..one-part Inner- and Outer RingsCylindrical Inner RingAxially non-constraining,floating bearing design

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nlimRPM

Speed Limit

Greaselubrication



C0 Cd D B UKF Type

N Nmm

ra da Da

mm

m

kg

One-part Inner- and Outer Rings,cylindrical bearing races on the Inner Ring CRONIDEX®- Floating Bearing with integrated Axial Displacement

UKF Floating BearingSeries AFSC, 70 AFDC

42

42

47

47

55

55

62

62

68

68

75

75

80

80

90

90

95

95

100

100

110

110

115

115

125

125

130

130

12

24

12

24

13

26

14

28

15

30

16

32

16

32

18

36

18

36

18

36

20

40

20

40

22

44

22

44

73600

69000

64000

60000

54400

51000

47200

44000

41600

39000

38400

36000

35200

33000

32000

30000

29600

27000

28000

26000

25600

24000

24000

22500

22400

21000

21600

20000

0,07

0,14

0.07

0.14

0,11

0,22

0,15

0,30

0,18

0,36

0,22

0,44

0,24

0,48

0,35

0,70

0,38

0,76

0,40

0,80

0,55

1,10

0,58

1,16

0,78

1,56

0,82

1,64

37,0

37,0

39,0

39,0

50,0

50,0

56,5

56,5

61,0

61,0

69,0

69,0

74,5

74,5

84,0

84,0

89,0

89,0

94,0

94,0

103,0

103,0

108,0

108,0

117,0

117,0

122,0

122,0

24,0

24,0

28,0

28,0

35,0

35,0

39,5

39,5

46,0

46,0

49,5

49,5

55,0

55,0

59,5

59,5

64,5

64,5

70,0

70,0

76,0

76,0

81,0

81,0

87,0

87,0

92,0

92,0

0,3

0,3

0,3

0,3

0,3

0,3

0,6

0,6

0,6

0,6

0,6

0,6

0,6

0,6

0,6

0,6

0,6

0,6

1,0

1,0

1,0

1,0

1,0

1,0

1,0

1,0

1,0

1,0

48000

45000

41600

39000

35200

33000

31200

29000

27200

25000

24800

23000

22400

21000

20000

18750

19200

18000

17600

16500

16000

15000

15200

14000

14400

13500

13600

12500

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

70 AFSC

70 AFDC

20

20

25

25

30

30

35

35

40

40

45

45

50

50

55

55

60

60

65

65

70

70

75

75

80

80

85

85

416

832

475

949

605

1209

800

1600

884

1768

1235

2470

1430

2860

1573

3146

1742

3484

1846

3692

2457

4914

2600

5200

3283

6565

3738

7475

4860

7560

5085

7910

6615

10290

8145

12670

8325

12950

11610

18060

12510

19460

12690

19740

14130

21980

14445

22470

18900

29400

19350

30100

25695

39970

27225

42350

20

25

30

35

40

45

50

55

60

65

70

75

80

85

a

a

a

Taper 1:12

d

D D

d

r

B

a

a Taper 1:12d

D D

d

B

AFSC AFDC

ar

ar

ar

ar

arar

ar


2437 UKF 38-39 26.08.2013 11:19 Uhr Seite 1

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Designs with flanges or collars

Bearings in various configurations(alternatively with Ceramic Balls …”C”)

Spindle BearingsLKSS (C)

Options:

Spindle BearingsLKSO (C)

High SpeedSpindle BearingsLKHS(C)

Spindle BearingsLSwith Spacer Balls

FASprings

SLAir Purge

TSTemperature-Monitoring

VSVibrationMonitoring

VRvariablepreloadVARIORING

FKliquid cooledjacket

UKF Bearing Cartridges

Integrated Bearing Set

preloaded

labyrinth seal

ready to assemble

38 w w w. u k f . d e

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UKF Bearing Cartridges

Cartridges are factory assembled Sets of Spindle Bearings,preloaded and greased, complete with applicable seals,ready for installation. This reduces parts count, as wellas manufacturing and assembly times, by combiningCovers, Seals, and Distance Rings into an easily installed,integrated assembly. Simply install the unit into a cylindricalbore in the applicable housing, and insert the shaft.

Sleeves are heat-treated steel, and are ground, includingthe outside diameter to the mounting face of the flangeor collar. This facilitates checking and justifying anyangular misalignment of the mount. Flanges are providedwith threaded jackscrew holes for easy removal, whilecover plates include an integrated labyrinth. Mating SplashRings are available for installation on the shaft.

Bearing Configurations

Various internal configurations are possible; these include2 x 2 rows (= Standard “2DB”) or “TBT, “QBC”, “QBT”, and“DB”. The bearings are spaced to provide rigidity and alarge span for supporting the shaft.

Cartridge Types

(P)LKSO… respectively, (P)LKSOC…assembled with Spindle Bearings 70 or 719,alternatively Hybrid Bearings with CeramicBalls (“…C”). Note: “P” Prefix indicates smallersleeve, reduced outer diameter; collar insteadof a flange.

Options

Cartridge configuration “TBT-FA”Spring loaded design: the third bearing’s Outer Ring isaxially loaded with springs to provide compensation forthe doubled preload of the front bearing pair, and toprevent migration of the third row.Sealing: either with lip seas or labyrinth; air purge isavailable with external connection, and with exhaustthrough the labyrinth.Sensors: for temperature and/or vibration, integrated inthe housing.Variable Preload: by applying hydrostatic pressure aroundthe Outer ring, between the bearing and the housing. Noadditional mechanical parts, higher preload available asneeded, simply switch on or off.

Special Design with liquid cooling: similar to water cooledspindle cartridges, the Bearing Cartridges can be designedwith cooling or heating capability, in order to maintainthermal equilibrium, such as in an air conditioned room.

Type LKLS, PLKLS

Featuring 2 x 2 track-bearings with Spacer Balls, preloaded,and a one-part Inner Ring, resulting in exceptional rigidityand maximum running accuracy. Inner Ring with the twobearings can also be supplied separately as “CartridgeSystem” (LS). Type “PLK…” with reduced outer diameterand a collar instead of a flange.For higher axial forces (e. g., drilling) an additional bearingfor axial forces can be provided.

Type LKLS

Type PLKHS

reduces parts and

working operations

shortens idle times


2437 UKF 40-41 22.08.2013 12:19 Uhr Seite 1

Probedruck


UKF Bearing Cartridges – Bearings Series 719Series PLKSO, PLKSS with Spindle Bearings, PLKSOC with Hybrid Bearings

Series PLKHS with High Speed Spindle Bearings, PLKHC with Hybrid Bearings

d DUKF Type D1 d1

25

30

35

40

45

50

55

60

65

70

75

80

85

90

100

110

120

130

140

150

PLK S.

resp.

PLK H.

50

55

65

72

78

85

90

95

100

110

115

120

130

140

155

165

180

195

205

225

57

62

73

80

86

93

98

103

108

118

123

128

138

150

165

175

190

205

215

235

35

42

46

52

57

65

69

75

82

86

92

100

103

112

124

137

147

160

170

185

39

47

51

57

63

71

75

82

88

92

98

106

109

118

131

144

153

168

180

195

45

53

57

63

69

77

81

89

94

99

105

113

116

126

139

152

161

178

190

205

70

75,5

79,5

84,5

89

92

101

101

104

112

112

120

121

128

131

150

148

170

173

182

56

60

64

69

73

73

81

81

81

89

89

96

97

104

106

123

121

141

141

149

55

59

63

67

71

71

79

79

79

87

87

95

95

103

103

119

119

139

139

147

10

11,5

11,5

11,5

12

14

14,5

14,5

17

17

17

18

18

17

18

20

17

19

22

23

8

9

9

9

8

9

10

10

12

12

12

12

12

12

13

14

14

14

15

15

3

3,5

3,5

3,5

4

4

4

4

5

5

5

5

5

5

5

7

7

7

7

7

d2 d3 L L1 l a a1 a2

25

30

35

40

45

50

55

60

65

70

75

80

85

90

100

110

120

130

140

150

2,5

3

3,5

4

t b

5,1

6,1

7,1

8,1

with Labyrinth SealsPLKHC . . . QBC

with Labyrinth SealsPLKSO . . . 2DB

Outer sleeve available with a flange in lieu of collar

Possible bearing configurations

d

L

d+0.0

5

D 1d

1

L

l

a

a d

1

1+0.0

5

-0.1

d2

a2

+0.1

3

1D

...DB ...TBT ...QBC ...PBCt

Dimensions are in mm; external dimensions are maintained, regardless of internal bearing configuration:

b = groove width

40 w w w. u k f . d e

2437 UKF 40-41 22.08.2013 12:19 Uhr Seite 2

Probedruck


LK S.

resp.

LK H.

UKF Bearing Cartridges – Bearings Series 70Series LKSO, LKSS with Spindle Bearings, LKSOC with Hybrid Bearings

Series LKHS with High Speed Spindle Bearings, LKHC with Hybrid Bearings

d DUKF Type D1 d1

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

110

120

130

140

150

62

68

72

80

90

95

105

110

120

125

130

140

150

160

170

180

200

210

230

250

270

85

95

95

105

125

130

140

150

160

165

170

180

190

200

215

225

245

255

280

300

320

35

42

46

52

57

65

69

75

82

86

92

100

103

112

116

124

137

147

160

170

185

39

47

51

57

63

71

75

82

88

92

98

106

109

118

123

131

144

153

168

180

195

45

53

57

63

69

77

81

89

94

99

105

113

116

126

130

139

152

161

178

190

205

71

78

82

90

105

111

120

128

137

143

148

160

168

177

190

200

220

230

255

270

290

70

75,5

79,5

84,5

89

92

101

101

104

112

112

120

121

128

129

131

150

148

170

173

182

55

59

63

67

71

71

79

79

79

87

87

95

95

103

103

103

119

119

139

139

147

10

11,5

11,5

11,5

12

14

14,5

14,5

17

17

17

18

18

17

17

18

20

17

19

22

23

8

9

9

9

8

9

10

10

12

12

12

12

12

12

12

13

14

14

14

15

14

3

3,5

3,5

3,5

4

4

4

4

5

5

5

5

5

5

5

5

7

7

7

7

7

d2 d3 T L1 l a a1 a2

50

53,5

57,5

61,5

67

66

74

73

75

81

80

88

89

95

95

96

109

108

127

126

135

M63 x 120º

Screw Size L

M83 x 120º

M103 x 120º

M104 x 90º

M124 x 90º

M125 x 72º

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

110

120

130

140

150

Countersunk for M…Cap Screw

with Labyrinth Seals

with Labyrinth SealsLKHC . . . QBC

LKSO . . . 2DB

Outer sleeve available with collar in lieu of flange

Possible bearing configurations

Dimensions are in mm; external dimensions are maintained, regardless of internal bearing configuration:

...DB ...TBT ...QBC

3d

+0.0

51

d

D d

1L

L

l

a1

da

+0.1

+0.0

5

d21

-0.1

2a

DT

1


2437 UKF 42-43 22.08.2013 12:18 Uhr Seite 1

Probedruck


Screw Size

UKF Bearing CartridgesType LKLS

d DUKF Type D1 d1

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

62

68

72

80

90

95

105

110

120

125

130

140

150

160

170

180

190

200

210

230

250

270

85

95

95

105

125

130

140

150

160

165

170

180

190

200

215

225

235

245

255

280

300

320

35

42

46

52

57

65

69

75

82

86

92

100

103

112

116

124

130

137

147

160

170

185

39

47

51

57

63

71

75

82

88

92

98

106

109

118

123

131

136

144

153

168

180

195

45

53

57

63

69

77

81

89

94

99

105

113

116

126

130

139

144

152

161

178

190

205

71

78

82

90

105

111

120

128

137

143

148

160

168

177

190

200

210

220

230

255

270

290

60

66

66

61

72

80

87

87

95

100

105

110

118

125

133

140

150

157

160

172

184

195

45

50

50

50

55

60

65

65

70

75

80

85

90

100

105

110

120

125

130

140

160

160

10

11,5

11,5

11,5

12

14

14,5

14,5

17

17

17

18

18

17

17

18

18

20

17

19

22

23

8

9

9

9

8

9

10

10

12

12

12

12

12

12

12

13

14

14

14

14

15

14

3

3,5

3,5

3,5

4

4

4

4

5

5

5

5

5

5

5

5

6

7

7

7

7

7

d2 d3 T L1 l a a1 a2

40

44

44

44

50

54

60

59

66

69

73

78

86

92

99

105

114

116

120

129

137

148

M63 x 120º

L

M83 x 120º

M103 x 120º

M104 x 90º

M124 x 90º

M125 x 72º

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

LKLS

D +0.0

5

d1d

d+0.0

5L

L1

l a

1

2

aa

D1

+0.1

-0.1

d3

d21

T

LKLS . . . 2 DF

with rolling guidance of ballsand Labyrinth Seals

Dimensions in mm

Countersunk for M… Cap Screw

42 w w w. u k f . d e

2437 UKF 42-43 22.08.2013 12:18 Uhr Seite 2

Probedruck


UKF Bearing CartridgesType PLKLS

d DUKF Type D1 d1

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

55

65

68

75

80

90

95

100

110

115

122

132

138

150

155

165

180

190

200

215

235

250

60

70

75

80

85

95

100

105

115

120

130

140

145

160

165

175

190

200

210

225

245

260

35

42

46

52

57

65

69

75

82

86

92

100

103

112

116

124

130

137

147

160

170

185

39

47

51

57

63

71

75

82

88

92

98

106

109

118

123

131

136

144

153

168

180

195

45

53

57

63

69

77

81

89

94

99

105

113

116

126

130

139

144

152

161

178

190

205

60

66

66

61

72

80

87

87

95

100

105

110

118

125

133

140

150

157

160

172

184

195

45

50

60

50

55

60

65

65

70

75

80

85

90

100

105

110

120

125

130

140

160

160

10

11,5

11,5

11,5

12

14

14,5

14,5

17

17

17

18

18

17

17

18

18

20

17

19

22

23

8

9

9

9

8

9

10

10

12

12

12

12

12

12

12

13

14

14

14

14

15

14

3

3,5

3,5

3,5

4

4

4

4

5

5

5

5

5

5

5

5

6

7

7

7

7

7

d2 d3 L1 l a a1 a2

47

52

52

53

57

64

70

69

76

80

85

90

98

103

108

115

125

131

133

143

153

162

L

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

PLKLS

t b

2,3 4,1

2,5 5,1

3 6,1

3 7,1

+0.0

5d

D d

L

L1

l

a

a

a

t

PLK LS . . . 2 DF

D1

d+0.0

5

+0.1

-0.1

d3

d21

1

2

1

b = groove width

with rolling guidance of ballsand Labyrinth Seals

Dimensions in mm


2437 UKF 44-45 22.08.2013 12:31 Uhr Seite 1

Probedruck


Mass

nlimRPM

Speed Limit

Greaselubrication


Ratings

UKF Type kg

UKF Bearing CartridgesType LKLS, PLKLS

2 x 2 tracks with rolling guidance of ballsand Labyrinth Sealspreloaded, Contact Angle α = 16°

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

625568657268807590809590

10595

110100120110125115130122140132150138160150170155180165190180200190210200230215250235270250

63006300540054005000500045004500410041003400340032003200310031002700270025002500230023002200220021002100200020001800180017001700160016001400140013001300120012001100110010001000

5400540045004500410041003600360032003200290029002700270025002500230023002100210020002000190019001800180016001600150015001400140013001300120012001100110010001000900900800800

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

LKLS

PLKLS

25

25

30

30

35

35

40

40

45

45

50

50

55

55

60

60

65

65

70

70

75

75

80

80

85

85

90

90

95

95

100

100

105

105

110

110

120

120

130

130

140

140

150

150

26000260003460034600406004060049500495005400054000645006450070000700008700087000

101000101000105000105000113000113000134000134000144000144000168000168000178000178000218000218000254000254000272000272000292000292000356000356000402000402000450000450000

3040030400378003780043900439005110051100

5380053800623006230064800648007950079500900009000091400914009390093900

112000112000117000117000143000143000145000145000177000177000203000203000216000216000223000223000266000266000295000295000328000328000

NC0

NCd D

mm

1,360,721,771,101,771,152,151,303,201,553,802,204,802,605,102,656,703,557,404,008,204,809,706,00

11,556,90

14,009,10

16,9510,1519,8012,3023,0014,9026,3018,5028,5020,4537,7028,3047,0032,9061,3039,90

LKLS

D d

PLKLS

D d

44 w w w. u k f . d e

2437 UKF 44-45 22.08.2013 12:31 Uhr Seite 2

Probedruck


The Bearing Cartridges (P)LKSO and (P)LKHS,as described, are based on Spindle Bearings

but the Type LKLS and PLKLS contain,as a special feature, the Bearing Cartridge System LS.

UKF Bearing Cartridge Systems LS

Detailed description is provided under the Bearing Cart-ridges LKLS, PLKLS (→ table)

d DUKF Type D1 d1

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

47

55

60

67

72

80

85

92

100

105

110

120

125

135

140

150

160

170

180

195

210

225

35

42

46

52

57

65

69

75

82

86

92

100

103

112

116

124

130

137

147

160

170

185

40

48

52

59

64

72

75

82

90

95

100

108

113

123

126

136

146

156

166

180

192

208

45

50

50

50

55

60

65

65

70

75

80

85

90

100

105

110

120

125

130

140

150

160

L1

40

45

45

45

50

55

60

60

65

70

75

80

85

93

98

103

115

119

125

132

145

155

L

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

LS

0,31

0,41

0,50

0,64

0,79

1,05

1,25

1,42

1,80

2,10

2,35

3,20

3,40

3,90

4,40

4,90

7,80

9,20

10,80

13,68

16,45

21,25

mkg

Bearing Cartridge System LS

Design Example

Bearing Cartridge LKSO 2 DB preloaded, with Distance Rings and Labyrinth Seal, ready for installation

Dimensions in mm

1d

-0.0

3

D

=

L

L

d

=

1d

+0.1

0+0.1

5

1

1

D


2437 UKF 46-47 22.08.2013 12:35 Uhr Seite 1

Probedruck


UKFGrade

HQ

0

I

1, 1/2

ISO

2

4

5

DIN

P2

P4

P5

ABEC

9

7

5

Non-standardized, Ultra Precision

more precise than

Basically, UKF Spindle Bearings are manufactured tospecifications, which exceed the accepted standards.

Accuracy, Tolerances

Spindle Bearings and Bearing Cartridges are manufacturedin Precision Classes from UKF I (Standard) to UKF 0, oreven higher. Axial runouts of the inner ring (which is therotating part in most cases), to < 1 μm, (bore d < 50mm), in accordance with UKF precision „HQ“, are alsoavailable. For larger bore bearings, consult the factory.

UKF Angular Contact Ball Bearings with Spacer Balls aremade in the Precision Class 1/2 (Standard) or better.Higher precision is available per the table below; alsospecial precision, „HQ“, with radial runout to 1 μm,respectively, 1,5 μm. Consequently, it is possible tocombine various Inner/Outer ring accuracies to meetspecific requirements, e. g., UKF O/I, HQ/I, or others.

The dimensional accuracy (size tolerances), in combinationwith the running precision (classes), is shown in therespective tables. For especially challenging applications,bearings can be factory screened, such that all bearingsof a specific lot have no more than 2…3 μm variation inbore diameter.

The point of maximum runout (ring’s eccentricity), alongwith the size variation (actual measured deviation), ismarked on the bearing.

Bearing widths are, in general, manufactured to highertolerances than the standardized values for ΔBs, ΔCs.In case of specific tolerance requirements, please contactUKF.

ISO

2

4

5

DIN

P2

P4

P5

ABEC

9

7

5

Markings

To simplify volume production requirements, bearingscan be factory pre-sorted into matched Bearing Sets.Bearings can then be easily coordinated for best fit withthe other components of the assembly, to speed assemblyprocesses.

Reduced dimensional variation of d and D

12

1 2D

d

d d

D D

Δ Δ

Δ Δ

Dimensional tolerances and maximum runout Kia, Kea

Inner Ring

Kia = Radial Runout

Sia = Axial Runout

Sd = Orthogonality, ID to faceΔds = Variation of Bore diameter

to Nominal valueΔBs = Variation of width

to Nominal Value

VBs = Parallelism

Outer Ring

Kea = Radial Runout

Sea = Axial RunoutΔDs = Variation of Outer Diameter

to Nominal ValueΔCs = Variation of width

to Nominal Value (similar to ΔBs)

Designations according to DIN 620, DIN ISO 1132

46 w w w. u k f . d e

2437 UKF 46-47 22.08.2013 12:35 Uhr Seite 2

Probedruck


Accuracy Grades

120 150 180 250 315 400

upon agreement

2,5 2,5 4 5 - -

2,5 2,5 5 7 - -

2,5 2,5 3 4 - -

5 5 5 6,5 8 10

5 5 5 6,5 8 10

upon agreement

4 5 5 7 - -

5 7 7 8 - -

4 5 5 6 - -

5 6 7 9,0 10 12

6 6 7 9 9 12

6 6 8 9 - -

9 10 10 13 - -

6 7 7 7 - -

9 10 13 15 18 20

11 13 14 15 18 20

6 6 8 9 - -

9 10 10 13 - -

6 7 7 7 - -

12 14 16 18 20 22

18 20 23 37 30 331)

otherwise as UKF 0 2)

otherwise as UKF I

up to

Kia

Kia

Sia

Sd

Kea

Sea

Kia

Kia

Sia

Sd

Kea

Sea

Kia

Sia

Sd

Kea

Sea

Kia

Sia

Sd

Kea

Sea

18

1

1,5

2

1,5

-

-

1

2,5

3

2

-

-

3,5

7

5

-

-

3,5

7

5

-

-

30

1

2

2,5

2

2,5

2,5

1

3

4

3

3

5

4

8

5

4

8

4

8

5

7

15

50

1

2

2,5

2

2,5

2,5

1

3

4

3

3

5

4

8

5

4

8

4

8

5

7

15

80

1,5

2,5

2,5

2

4

4

1,5

3

4

3

4

5

5

8

6

7

10

5

8

6

9

16

class

UKF HQ/01)

UKF 0/0

better

than

P 2/

ABEC 9

UKF HQ/I2)

UKF I/I

better

than

P 4 /

ABEC 7

UKF 1/1

better

than

P 5 /

ABEC 5

UKF 1/2

IR better

than

P 5/

ABEC 5

d/D in mm

Inner Ring (d)

Inner Ring (d)

Outer Ring (D)

Inner Ring (d)

Inner Ring (d)

Outer Ring (D)

Inner Ring (d)

Outer Ring (D)

Inner Ring (d)

Outer Ring (D)

120 150 180 250 315 400 -8 -10 -10 -12 - --100 -120 -140 -160 -180 - 4 5 5 6 7 - -8 -9 -10 -11 -13 -15

-6 -8 -8 -9 - --100 -120 -140 -160 -180 - 3 4 4 5 6 - -5 -5 -6 -8 -8 -10

Class

UKF 2UKF 1

UKF IUKF 0

d/D in mmIR (d) Δds

ΔBs

VBs

AR (D) Δds

IR (d) Δds

ΔBs

VBs

AR (D) ΔDs

Dimensional Accuracy, values in μm

bis0...0...0...0...

0...0...0...0...

18-5

-603-

-4-60

2-

30-5

-703

-6

-4-70

2-4

50-6

-803

-6

-4-80

2-4

80-7

-904

-7

-5-90

3-4

Running Precision, values in μm


iaK eaK

Cs

Bs

iaS eaSDS

dsd Ds

D

K

dsd

Cs

Bs

DS

D Ds

SiaS

eaKia

ea

2437 UKF 48-49 22.08.2013 12:36 Uhr Seite 1

Probedruck


t1 cylindricity (DIN ISO 1101)

t2 wobble (DIN ISO 1101)

t3 co-axiality (DIN ISO 1101)

Ra surface finish (DIN 4768)

n·dm speed factors

dm average diameter of bearingdm = (d + D)/2

d1 kleiner Kegeldurchmesserd1 d = Nennmaß der Welle

d2 großer Kegeldurchmesserd2 = d1 + 0,08334 · L

L Kegellänge L = 0,95 · B(B = Lagerbreite)

ATD Kegelwinkeltoleranz alsDurchmesserdifferenzsenkrecht zur Achse

Form- und Lagetoleranzen sowie Mittenrauhwert wiebei zylindrischen Wellensitzen.

Kegelwinkel 4º 46’ 18,8’’Einstellwinkel 2º 23’ 9,4’’

Nominal dof shaftin mm

more upthan to

for grades UKF 1 and 2 for grades UKF I, O and HQtolerance

for dtolerance for d

n·dm in rpm · mm

≤ 1,2 ·106 > 1,2 · 106

values in μm

t1 t2t3

18

18 30

30 50

50 80

80 120

120 180

180

t1 t2t3

0- 5

0- 6

0- 7

0- 8

0- 9

0- 10

0- 12

Ra

1

1

1

1,5

1,5

2

3

2

2,5

2,5

3

3

4

5

6

8

8

9

9

10

12

+ 2- 2

+ 2- 2

+ 2- 3

+ 2- 3

+ 2- 4

+ 3- 5

+ 4- 6

0,5

0,5

0,5

0,8

0,8

1,5

2

1,2

1,5

1,5

2

2

3

4

4

5

5

6

6

8

10

0- 4

0- 4

0- 5

0- 5

0- 6

0- 8

0- 10

0,2

0,2

0,2

0,4

0,4

0,4

0,4

Kegeliger Wellensitz für AF-Lager

Nennmaßder Welle d

in mm

Abmaßfür d1

in μm

+ 73 + 91 + 108 + 135 + 159 + 193

+ 64 + 80 + 97 + 122 + 146 + 178

30

30

40

40

50

50

65

65

80

80

Nennmaß derKegellänge L

in mm

KegelwinkeltoleranzATD in μm

+ 2,0 + 2,5 + 3,0 0 0 0

25

25

40

40

über

bis

über

bis

48

Fit TolerancesShaft Seats

3 t /300 3 t /300

w w w. u k f . d e

1t

t 2 BA

RaRa

B

d

A

A

d

B

d2

2AT

D

L

d1

Kegel 1:12

2437 UKF 48-49 22.08.2013 12:36 Uhr Seite 2

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t1 cylindricity (DIN ISO 1101)

t2 wobble (DIN ISO 1101)

t3 co-axiality (DIN ISO 1101)

Ra surface finish (DIN 4768)

Installation

UKF Angular Contact Ball Bearings and SpindleBearings require proper installation andhandling, including cleanliness, as well asappropriate precision of the surroundingparts for maximum performance. As sup-plied, the bearings are prepared withcorrosion-resistant oil or pre-lubricated forlife with grease. If lubricating oils are used,the bearing(s) first have to be washed to avoidany cross-contamination. This is also neces-sary in case of re-lubrication with grease.

UKF spindle Bearings for universal arrange-ment/pairing can be combined to variousconfigurations. As the preload is alreadygiven ex works no special adjustment isnecessary.

Intermediate elements, such as Spacer Ringsor sleeves must be produced with flatnessand parallelism < 0,002 μm. The matingsurfaces (face) of lock nuts must be orthogo-nal to the thread axis.

When installing bearings, all bearings shouldbe aligned, such that their points of maximumeccentricity (marked on the bearing rings)are inline; both inner and out rings. This willprovide maximum accuracy for the assembly,and minimize wobble of the spindle.

Installation

Seats on shafts and in housings should becoated with a light film of compatible oil orgrease, before placing the bearings intoposition. Cover plates for fixing should havea sufficient number of screws, which aretorqued symmetrically to minimize distortionand runout errors.

The double row UKF Spindle Bearings (“USO”)feature a “one-piece Outer Ring”, withseparate, dual Inner Rings. To obtain thecorrect preload, simply lock the Inner Ringstightly against each other.

The required tightening torques of the locknuts depend on various conditions, includingbearing preload, size and pitch of the thread.The quality of the threads is also a significantfactor, so each application must be evaluatedseparately.

The one-piece outer ring, once engaged intothe housing’s bore, is easy to slide intoposition. This is advantageous for installati-ons, which require a floating bearing at oneend, to compensate for expansion andcontracting due to thermal effects.

When assembling bearings onto the shaft,respectively, into the housing, never use

Installation

force. In applications requiring a press fit,the bearing can first be warmed or cooled,as necessary, to facilitate installation. Ingeneral, temperatures of 80°…90°C aresufficient; temperatures higher than 110°Care to avoid! It is important to keep allcomponents square during assembly, andto apply symmetrical pressure against therings when assembling the spindle.

Attention: if bearing’s inside diameter, d, isnear its lower size limit, the shaft’s diametershould also be at the lower end. Similarly, ifthe bore diameter machined into the housingis finished at the upper end of tolerance, thena bearing with its tolerance of bearingdiameter, D, should also be at the higher end.

Dire assembly errors can usually detected byrotating the shaft. Intermittent binding orinconsistent rotation, are indications of anassembly mistake.

Another qualitative indicator for incorrectassembly is noise, emanating from therotating spindle. Error must be correctedimmediately.

values in μm

Nominal Dof borein mm

more upthan to

for grades UKF I, O und HQtolerance

for d

fixed floatingbearing bearing

for grades UKF 1 and 2tolerance

for d

fixed floatingbearing bearing

30

30 50

50 80

80 120

120 180

180 250

250 315

315

Ra

1,2

1,5

2

2,5

3

4

5

6

3

3

3

4

5

6

8

10

5

5

6

8

8

10

10

12

0,4

0,4

0,4

0,8

0,8

0,8

1,6

1,6

t1 t2t3t1 t2

t3

1

1,2

1,5

2

2,5

3

4

5

2

2

2

2,5

3

4

5

6

4

4

5

6

6

8

8

10

+ 5+ 2

+ 6+ 2

+ 8+ 2

+ 10+ 4

+ 14+ 5

+ 16+ 6

+ 20+ 8

+ 23+ 9

+ 3- 1

+ 3- 2

+ 4- 2

+ 5- 3

+ 6- 3

+ 8- 3

+ 10- 3

+ 10- 4

+ 7+ 2

+ 8+ 2

+ 10+ 2

+ 13+ 4

+ 17+ 5

+ 20+ 6

+ 23+ 8

+ 27+ 9

+ 4- 2

+ 4- 3

+ 5- 3

+ 6- 4

+ 8- 4

+ 10- 4

+ 12- 4

+ 13- 5

49

Fit TolerancesHousing Seats

w w w. u k f . d e

3

t 1

3

2t BA

Ra

t /300 B

D

A

Ra

t /300 A

Ra

Ra

D

B

2437 UKF 50-51 22.08.2013 12:37 Uhr Seite 1

Probedruck


The necessary volume of oil per bearing is approx.1 ml/h, per 25 mm of bearing bore diameter. For theHigh Speed Bearings Type “UHS” and “UHC”, their pitchdiameter for oil injection is specified in the dimensionstable.

Grease

For grease lubrication, we recommend grease with a lowapparent or dynamic viscosity, i.e., with low consistencyin order minimize resistance to rotation.

As the result of many years experience, greases likeISOFLEX LDS 18 Special A and ISOFLEX NBU 15 for SpindleBearings, have been found to be well suited for our AngularContact Ball Bearings. (Messrs. Klüber: www.kluber.com).For very high RPM applications, especially with HybridBearings, we suggest TURMOGREASE High Speed L 252(Messrs. Lubcon: www.lubcon.com). But other qualifiedbearing greases, especially greases of NLG class 3 (forlower speed) and class 2 (for medium speed), with apenetration of 220…295, are usable.

Greases exhibiting high adhesion have demonstratedremarkable increases to the allowable speed limit, withouthaving to employ Oil-Air-devices. Additionally, the extracost for Hybrid Bearings becomes insignificant in relati-onship to the savings realized by eliminating additionalinfrastructure. UKF has many years of experience withHybrid Bearings and their handling, lubrication and cooling.

A guideline for the appropriate grease can be found withthis equation:

VF = dm2 · B · bF

VF = volume of grease, cm3

dm = average diameter (d+D)/2, cmB = width of bearing, cmbF = volume factor of grease (from table, below)

Notice: for bearings of Series “USO” and “AFDC” thecalculated quantity of grease is for each row of balls.

UKF bF

Type Series d ≤ 20 d=25..45 d=50..100 d > 100

719 UHS/UHC 0,079 0,052 0,043 0,03170 UHS/UHC 0,085 0,059 0,051 0,046719 USS(C)/USO(C) 0,049 0,037 0,034 0,03070 USS (C) USO (C) 0,064 0,048 0,039 0,036AFSC/AFDC 0,077 0,058 0,047 0,043K 0,012 0,008 0,007 0,006UK 0,015 0,011 0,009 -UL 0,014 0,013 0,011 0,010UM 0,013 0,012 0,008 -

Lubrication

UKF Angular Contact Ball Bearings and Spindle Bearingscan be lubricated with either oil (including oil-mist andminimal oil-air) or grease. Bearings are shipped with ananti-corrosive oil coating, or if specified, factory greased,ready for installation. (Specials, for dry running applica-tions, upon request.)

The double row Spindle Bearings of Type “USO” can befurnished with a bore through the Outer Ring for supplyinglubricants directly into the void between the raceways,and subsequently into the two bearing grooves. In thecase of grease lubrication, this void (space) can storesurplus grease away of the raceways.

Because some lubricants (grease, oil) are not compatiblewith each other, we recommend a thorough wash out

of the bearings, if the same products are not applied,especially if subsequent grease lubrication is proposed.

Oil

Oil lubrication, whether for high-speed (high RPM) opera-tion or for cooling, is integral to the overall spindle design,and may consist of circulating oil, atomizers, compressedair injection and even mechanical cooling devices, asrequired.

As the viscosity of oil is dependant on, among otherfactors, the temperature – under rising temperature itwill decrease – sufficient viscosity (operational viscosity)must be ensured at the normal working temperatures.For increasingly higher speeds, lower viscosity!

For example: A required operational viscosity of 12 mm2/s,combined with a normal working temperature of 40°C,requires a nominal viscosity of 9 mm2/s.

The nominal viscosity of an oil (in mm2/s at 50°C) can beobtained from the usual V-T-diagram. In general lubricatingoils with EP-additives, as per DIN 51517, etc., are recom-mended. For peak performance, lubrication systemsshould provide no more than 1 drop of oil/in 6 minutes,per 25 mm bore of bearing.

With minimal Oil Lubrication, very small quantities ofsuitable oil are adequate, but it must be carefully distri-buted, to ensure that the oil moistens the balls and thegrooves. Therefore, the nominal viscosity should not betoo low to achieve a sufficient covering of oil. The nominalviscosity should be near 25 mm2 at 50°C.

If a suitable operational temperature is not attained,another oil with higher or lower nominal viscosity shouldbe used.

50 w w w. u k f . d e

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For greased bearings, a routine warm-up is recommended.A warm-up period has a significant effect on bearing lifeand efficiency.

Warming up should proceed by gradually increasingspeeds, with the first one set at about 20 % of the maximumallowable speed. The spread between beginning andmaximum speed should then be divided into four steps,during the temperature should be monitored: subsequent,higher steps can follow as soon as the temperature hasstabilized.

Alternatively, a brief moderate-speed run to distribute thegrease, followed by a short ramp-up to speed and thenoff, again, culminating with a thermal equalization periodmay also be used. Although this more traditional warm-up is faster, it is not as conducive to long bearing life.

The working life of grease depends on various factors,including forces, vibration, contamination, humidity andtemperature – and, above all, the operating speed. Thefollowing diagram gives an overview of possible lubricantlifetimes, dependent on the characteristic value of speedn · dm as rpm · mm.

Lifetime LG of grease dependent on characteristicvalue of speed

Relubrication of grease

It is possible to improve the lifetime of the grease witha factor of 2 by using an automatical relubrication system.This micro electrical controlled unit can be connectedwith an extern CNC. As the result a relubrication of thebearings depending on the lifetime of the machine ispossible.

Temperature

High precision, super-finished races reduce friction andheat, and with time, they reduce wear and tear. Comparedwith paired single-row bearings, the UKF double-rowbearings have higher parallelism accuracy. The designcreates a void between the rows, which can effectivelyfunction as a grease reservoir. A similar configurationcan result by using UKF distance rings, for High SpeedBearings Types “UHS”, “UHC”.

Hybrid Bearings will run at lower temperatures thanbearings with steel balls, for the comparable speeds(RPM).

Friction

The preceding remarks about accuracy and runningcharacteristics, under “Temperature” also apply to friction.Bearings have three kinds of friction:

1. rolling friction between the balls and raceways2. sliding friction between balls and cages - and also

between cage and its guidance on the Inner- or OuterRing (rigid cage!)

3. viscous friction from the lubricant.

The inherent friction (resistance to rolling) in a rollingelement bearing is quite low, and is insignificant whencalculating fL, Lh.

Determining an optimal preload, careful selection oflubricants, and proper care during installation may furtherreduce friction.

Acoustic Noise

Noise can occur as the result of vibrations being trans-mitted through the components. Vibrations are usuallycaused by problems in the rotating parts, e. g., the naturalfrequency of the shaft with assembled bearings (-innerring, cage, balls). Appropriate design analysis shouldprevent such occurrences.

15000 h

0,1

5000 h

10000 h

20000 h

25000 h

0,5 1,0

n x d1,5 x 10

rpm x mm

6

L F

m


2437 UKF 52-53 22.08.2013 12:39 Uhr Seite 1

Probedruck


Accuracy

In accordance with the requirements of Ball Screws, thebearings provide both high running precision and dimen-sional accuracy.

face runout Sd 2,0 μm at d ≤ 25 mm2,5 μm at d > 25 mm

tolerance I.D. Δds 0... -5 μmtolerance O.D. ΔDs 0... -10 μmtolerance width ΔBs 0... -250 μm

Ball Screws must provide high-load, bi-directional support,combined with high axial rigidity and excellent accuracy.With their unitized Outer Ring, similar to the well-knownUKF double-row Spindle Bearings, our GSX series providesan ideal solution.

Design: separate Inner Rings, self-contained with shieldsor seals, synthetic cages, high contact angle, α = 60°, andincreased number of balls, resulting in higher axial stiffnessand load capacity. The bearing’s rows are oriented in anO-configuration for high rigidity. Bearing preload is built-in at manufacture, and is realized whensecuring the Inner ring(s) to the shaft. GSXbearings can also be combined in pairedsets.

Cover Plate DG

Standardized parts provide easy and precise

installation, securing the bearing between the respectiveshoulders for bi-directional thrust loads.

Seals

Bearings and Bearing Cartridges with the designation“2RS” have lips seals. So a further sealing at the surroundingparts is not necessary. Bearings with the designation “2Z”have shields on both sides, with a gap at the rotatingInner Ring. This means less friction, suitable for higherspeeds (RPM).

Bearing Cartridges

Double row/four row Bearing Units are assembled intoflanged bushings to make production and installationeasier; eliminates having to generate a shoulder in arecessed hole. A cylindrical bore, with an orthogonal faceon the outside is much easier to produce.The ground cartridge (diameter and flange) allows theinstaller use it for checking the alignment. The flangehas a machined flat for offset mounting.

Option

For an even easier installation, and for ad-justing the tension of Ball Screws and thesupport Bearings of double-ended confi-gurations, additional washers, as shownbelow, can be furnished at extra charge.

bi-directional loads,installation usingbolt-on cover-plate orcomplete cartridges


2Z

2RS

52 w w w. u k f . d e

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UKFType

Dimensions SeatDimensions

UKFType

for screws

nlimrpm

SpeedLimit

RatingsSeatingtorque

AxialPreload

Lock Nut Frictiontorque

Separa-ting-force

Axialrigidity

Tiltingrigidity Type

UKFType

Series GSX

d D d1

GSX

GSX

GSX

GSX

GSX

GSX

GSX

m

12

15

20

25

30

40

50

B min. D1 max. kg

12

15

20

25

30

40

50

42

45

52

57

62

75

90

25

25

28

28

28

34

34

16

20

25

32

40

50

63

33

37

43

48

53

67

81

0,20

0,21

0,31

0,34

0,39

0,61

0,88

D1 D2 b

DG

DG

DG

DG

DG

DG

DG

d

12

15

20

25

30

40

50

D3 Tk

65

70

75

80

85

105

120

42

45

52

57

62

75

90

33

37

43

48

53

67

80

10

10

10

10

10

12

14

M6

M6

M6

M6

M6

M8

M8

3 x 120º

3 x 120º

4 x 90º

4 x 90º

6 x 60º

6 x 60º

8 x 45º

52

55

62

67

72

89

104

C0 N Fv N MA Nm

GSX

GSX

GSX

GSX

GSX

GSX

GSX

12

15

20

25

30

40

50

24650

27900

46850

54800

64000

101000

125700

16900

17850

25900

27400

28750

42800

46450

960

1070

2050

2350

2650

3200

3700

2200

2450

4750

5500

6100

7250

8800

370

400

650

750

850

950

1250

50

65

135

190

280

550

950

NM 12 X

NM 15 X

NM 20 X

NM 25 X

NM 30 X

NM 40 X

NM 50 X

8

10

18

25

32

55

85

0,16

0,20

0,30

0,40

0,50

0,70

0,90

7600

7000

5400

4700

4300

3300

3000

0,08

0,10

0,15

0,20

0,25

0,35

0,45

3800

3500

3000

2600

2200

1800

1500

RK

Nm/m radC N MR Nm

2RS 2Z 2RS 2Z

Fd N Ra N/μm

DGGSX

d+0.1-0.022

-0.25B

b

D1

k

32

+0.1

D

±0.1

5T

-0.0

5-0

.02

D

Dd1 1

60º

D-0

.01

d-0

.005


2437 UKF 54-55 22.08.2013 12:40 Uhr Seite 1

Probedruck


nlimrpm

SpeedLimit


AxialPreload


Separa-ting-force

Axialrigidity


UKFType

Drilled andCountersunk

Size Number

UKFType

FSX

FSX

FSX

FSX

FSX

FSX

FSX

Series FSX

L1 l aL

C0 N Fv N

12

15

20

25

30

40

50

24650

27900

46850

54800

64000

101000

125700

16900

17850

25900

27400

28750

42800

46450

960

1070

2050

2350

2650

3200

3700

2200

2450

4750

5500

6100

7250

8800

370

400

650

750

850

950

1250

50

65

135

190

280

550

950

NM 12 X

NM 15 X

NM 20 X

NM 25 X

NM 30 X

NM 40 X

NM 50 X

8

10

18

25

32

55

85

0,16

0,20

0,30

0,40

0,50

0,70

0,90

7600

7000

5400

4700

4300

3300

3000

0,08

0,10

0,15

0,20

0,25

0,35

0,45

3800

3500

3000

2600

2200

1800

1500

C N MR Nm2RS 2Z 2RS 2Z

kg

FSX

FSX

FSX

FSX

FSX

FSX

FSX

12

15

20

25

30

40

50

d d1

12

15

20

25

30

40

50

20

25

30

37

43

51

64

50

55

60

80

80

90

110

80

85

100

120

120

130

150

40

41

46

49

49

58

58

27

28

29

32

32

32

34

25

25

28

28

28

34

34

8

8

9

11

11

12

12

30

32

38

45

45

49

56

65

70

80

100

100

108

128

14

14

35

35

35

69

69

0,83

0,85

1,32

2,14

2,04

2,99

4,10

TD D1 A MAS

Nm

M6

M6

M8

M8

M8

M10

M10

6 x 54º

7 x 45º

6 x 54º

6 x 54º

7 x 45º

7 x 45º

8 x 33º 45'

Ra N/μm MA NmFd N RK

Nm/m rad

d-0

.005

d+0.1

T±0.1

1D1

1L

L

a l

1 Dh4

+0.1

d

A

DIN EN ISO 4762 (10.9) M. . .

for screws

A - A

A

A

FSX

54 w w w. u k f . d e

2437 UKF 54-55 22.08.2013 12:40 Uhr Seite 2

Probedruck


SpeedLimit


AxialPreload


Separa-ting-force

Axialrigidity


UKFType

Drilled andCountersunk

Size Number

UKFType

FDX

FDX

FDX

FDX

FDX

FDX

FDX

L1 l aL

nlimrpmC0 N Fv N

12

15

20

25

30

40

50

49300

55800

93500

109500

128000

202000

251000

27400

28900

42000

44300

46500

69300

75200

960

1070

2050

2350

2650

3200

3700

4400

4900

9500

11000

12200

14500

17600

615

700

1150

1300

1500

1650

2200

110

145

310

430

580

1200

2250

NM 12 X

NM 15 X

NM 20 X

NM 25 X

NM 30 X

NM 40 X

NM 50 X

8

10

18

25

32

55

85

0,25

0,30

0,45

0,60

0,75

1,05

1,35

6000

5600

4300

3700

3400

2600

2400

0,16

0,20

0,3

0,40

0,5

0,7

0,9

3400

3100

2700

2300

2000

1600

1300

C N MR Nm2RS 2Z 2RS 2Z

kg

FDX

FDX

FDX

FDX

FDX

FDX

FDX

12

15

20

25

30

40

50

d d1

12

15

20

25

30

40

50

20

25

30

37

43

51

64

50

55

60

80

80

90

110

80

85

100

120

120

130

150

65

66

74

77

77

92

92

47

48

52

55

55

64

64

50

50

56

56

56

68

68

8

8

9

11

11

12

12

30

32

38

45

45

49

56

65

70

80

100

100

108

128

14

14

35

35

35

69

69

1,15

1,31

1,79

3,20

3,01

4,12

5,80

TD D1 A MAS

Nm

M6

M6

M8

M8

M8

M10

M10

6 x 54º

7 x 45º

6 x 54º

6 x 54º

7 x 45º

7 x 45º

8 x 33º 45'

Ra N/μm MA NmFd N

Series FDX

RK

Nm/m rad

A45°

Dh4

d1+

0.1

la

-0.0

05

d

1

TD1

±0.

+0.1

d

L 1

L

A - A

A

A

DIN EN ISO 4762 (10.9) M. . .

for screws

FDX


Design Examples

both ends supported with bearings GSX and AFDC (Floating Bearing)

only one end supported with bearings (cantilevered); Bearing Cartridge FDX

FSX FDX

56 w w w. u k f . d e

UKFType

Series 719

Dimensions in mm

Series 70

*) Specify Bearing Type and required width

UKFType

Dimensions in mm

for mounting the bearings with a specified separation,with feed holes for pneumatic oil lubrication or greasereservoir. Compatible with types 719/70 UHS resp. UHC

designed for shrink fit onto the shaft; contours matchthe labyrinth seals of our Bearing Cartridges; heat ringto expand for installation.

UKF Components

d De

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

DR

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

100

110

120

130

140

150

D

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

100

110

120

130

140

150

10

10

10

10

12

12

12

12

12

12

15

15

15

15

15

18

18

18

18

18

18

37

42

47

55

62

68

72

80

85

90

100

105

110

120

125

140

150

165

180

190

210

26,1

31,1

36,1

42,7

48,2

53,8

58,2

64,3

69,4

74,5

81,4

86,4

91,5

97,8

102,9

114,9

124,9

136,9

148,5

158,5

172,8

1,2

1,2

1,2

1,2

1,5

1,5

1,5

1,5

1,5

1,5

1,5

1,5

1,8

1,8

1,8

1,8

1,8

1,8

2,0

2,0

2,0

42

47

55

62

68

75

80

90

95

100

110

115

125

130

140

150

170

180

200

210

225

28,3

33,3

39,3

44,6

50,7

56,0

61,0

68,2

73,3

78,3

84,7

89,7

96,8

101,9

109,0

119,0

132,6

142,6

156,3

166,3

177,9

1,4

1,4

1,4

1,4

1,7

1,7

1,7

1,7

1,7

1,7

1,7

1,7

2,0

2,0

2,0

2,0

2,0

2,0

2,2

2,2

2,2

Bmin* ds DeD ds d

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

SR

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

31

36

42

48

53

60

65

70

75

80

85

92

97

102

109

114

119

128

139

150

160

175

35

42

46

52

57

65

69

75

82

86

92

100

103

112

116

124

130

137

147

160

170

185

9,8

11,3

11,3

11,3

11,8

13,8

14,3

14,3

16,8

16,8

16,8

17,7

17,7

16,7

16,7

17,7

17,7

19,7

16,7

18,7

21,7

22,7

2

2

2

2

2,5

2,5

2,5

2,5

3

3

3

3

3

3

3

3

4

5

5

5

5

5

d1

6,5

7,5

7,5

7,5

6,5

7,5

8,5

8,5

10

10

10

10

10

10

10

11

12

12

12

12

13

13

39

47

51

57

63

71

75

82

88

92

98

106

109

118

123

131

136

144

153

168

180

195

45

53

57

63

69

77

81

89

94

99

105

113

116

126

130

139

144

152

161

178

190

206

d2 d3 a1 a2a

UKF Distance Ring DR UKF Splash Ring SR+0.0

3

+0.0

1

D

B

dD

-0.1

-0.0

5

-0.1

0

±0.1

sd

e +0.3

d2

-0.5

+0.5

3

-0.3

d

-0.5

-0.3

d1

d-0

.05

-0.0

3

2

1

a

15º

a

a


2437 UKF 58-59 22.08.2013 12:42 Uhr Seite 1

Probedruck


UKF Lock Nuts NMA, NMB NMX

Form A

h

0,5

Form B

h

h1

D G D

M

b

t

D G D D1 1 2-0

,6-0

,7

D d G

0.5

1

h

b t

m

c

UKFType

Dimensions in mm

Lock Nut NM

Lock Nuts provide an easy and secure axial fastening ofbearings on a shaft. Form A needs less space; Form B isalso ideal for fastening Bearing Cartridges.Both have, depending on the size, two or three radial setscrews for securing.

Form X is mainly used if higher axial forces occur, e. g.,Support of Ball Screws. They have two set screws to guardagainst loosening.

UKFType

Dimensions in mm

UKF Components

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

39

46

51

58

63

71

74

81

89

94

99

107

111

120

125

134

140

147

157

170

180

195

31

38

43

48

53

58

65

70

75

80

85

92

97

102

109

114

119

124

134

144

156

166

2

2

2,5

3

3

3

2,5

3

3,5

4

3,5

3,5

4

4

4,5

5

5

5

5

5

5

5

6

6

6

6

7

7

7

8

8

8

8

8

9

9

10

10

10

11

12

12

12

12

35

42

46

52

57

65

69

75

82

86

92

100

103

112

116

124

130

137

147

160

170

185

D1 h h1G

M42 x 180º

12

12

12

13

14

15

16

17

18

18

18

18

20

20

22

25

26

26

26

28

28

28

6

6

6

7

7

8

9

9

10

10

10

10

11

11

13

14

14

14

15

15

15

15

6

7

7

8

8

8

10

10

10

10

10

10

10

10

12

12

12

12

12

12

12

12

M25 x 1,25

M30 x 1,25

M35 x 1,25

M40 x 1,25

M45 x 1,25

M50 x 1,25

M55 x 1,25

M60 x 1,25

M65 x 1,25

M70 x 1,25

M75 x 1,25

M80 x 1,25

M85 x 1,25

M90 x 1,25

M95 x 1,25

M100 x 1,25

M105 x 1,5

M110 x 1,5

M120 x 1,5

M130 x 1,5

M140 x 1,5

M150 x 1,5

D D2

A Bb t

M52 x 180º

M63 x 120º

M83 x 120º

M

NM

NM

NM

NM

NM

NM

NM

22

25

32

38

45

58

70

18

21

27

33

40

52

64

8

8

10

12

12

14

14

hd1G

4

4

5

6

6

7

7

M4

M4

M5

M6

M6

M6

M6

3

3

4

5

5

6

6

M12 x 1

M15 x 1

M20 x 1

M25 x 1,5

M30 x 1,5

M40 x 1,5

M50 x 1,5

D b t

12X

15X

20X

25X

30X

40X

50X

2

2

2

2

2

2,5

2,5

c m

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

58 w w w. u k f . d e

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UKF Special

Special Designs and Configurations

The UKF Range of Products enables us to offer a varietyof modifications to complement the Standard Types.

In lieu of the standard, fibre cage, solid cages (of brassor special plastic material) with dry-running capability foremergency cases are available. Of special interest are cagesof Polyetheretherketon (PEEK), a thermoplastic reinforcedby carbon fibre, and noted for high wear and temperatureresistance, combined with good sliding properties.

UKF Spindle Bearings can be made with a coated surface,for maintenance-free applications and extreme conditions,e. g., vacuums and space.

UKF Bearings and Bearing Cartridges can even be manuf-actured in larger sizes than shown in the tables: up to amax. O.D. of 380 mm.

Specially designed bearings with modified grooves,contoured to provide line contact, attain significantly higherload capacity. An example are bearings used for smoothlyadjusting transmission assemblies, even under higherworking forces.

Slim-line Spindle Bearings, double row and preloaded,with solid cage for very constrained spaces, e. g., d = 62,

D = 74, form USO.

Within the dimensions of an USO-Type Bearing (i. e., a pairof Single Row Bearings) a special construction is availableto place the bearing under an elastic preload usingcompression springs. Forces and numbers of springs arein accordance with the requirements.

To guard against corrosion, the bushings and cover platescan be plated: hard chrome, electro-less nickel, etc.Working forces can be monitored with sensors at thebearings. UKF Bearing Cartridges with integrated sensor

for working forces boast the same standard dimensionsas the regular models, with only the addition of a connec-ting cable!

The variable preload system, UKF VARIORING, can beintegrated into Bearing Cartridges “LKSO/LKSS”.


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Series 719 USS, 70 USS as a single bearing or in tandemarrangement (contact angle α = 21º)

Series 719 UHS/UHC... - A 15, 70 UHS/UHC...-A15(contact angle α = 15°)

as a single bearing or in tandem arrangement

for paired bearings in O or X arrangement

Series 719 UHS/UHC... - A 25, 70 UHS/UHC...-A25(contact angle α = 25°)

as a single bearing or in tandem arrangement

for paired bearings in 0 or X arrangement

fL values for spindle bearings and angular contact ball bearings

The fL-values are based on many years of experience, and are meantto serve as a guideline for new designs.

Dynamic rating C of bearing groups

For grouped bearings, factor fi is to be taken into consideration.

Cgroup = fi · Csingle [N]

fi = i0,7

i = number of bearings

In applications, where bearings of type USS are to be combined withtype USO, in tandem-O-arrangements, the dynamic rating of bearingtype USS is to be considered according to the following equation:

Cgroup = 2,36 · CUSS

By following this guidance, allowance is made for the fact that due tothe even load distribution, the rating of bearing type USO is higher thana pair of single bearings, type USS. Also in the case of double row orquadruple row bearing arrangements, USO type bearings should bepreferred to single row bearings.

Cgroup = 1,62 · CUSO for precision class UKF I/I and UKF 1/1

Cgroup = 1,80 · CUSO for precision class 0/0

application

turning and milling spindlesdrilling spindlesgrinding spindleswork head spindlescentrifugescircular sawscoating machinesspindles for machining centres

Nominal bearing life Lh

In order to determine the nominal bearing life, Lh, of a bearing arran-gement, the value of the dynamic load, fL, must first be calculated.

fL = C ·fn P

fL = symbol for the dynamic loadC = dynamic load rating [N]P = dynamic equivalent load [N]fn = speed factor

With the calculated value for fL, the nominal bearing life Lh in hours canbe determined from the table below. This is in accordance with theInternational Standard (DIN ISO 281) for a bearing failure rate probabilityof 10 %.

The actual length of services of a bearing, i. e., the running time inhours, depends on several factors. One factor is the operational runningcondition, e. g., flawless lubrication and prevention of any contamination,including coolants or debris. Finally, a perfect installation is an absolutenecessity.

Nominal bearing life Lh

X

1

Y X

0,72

Y

Intermediate values can be found with the following equation: Lh = 500 h · fL3

Dynamic equivalent load P

The dynamic equivalent load P is a compensation load for the bearing-life calculation. The dynamic equivalent load can be considered as aconstant radial loading, in magnitude and direction, under which acomparably loaded anti-friction bearing would actually reach the samelife limit.

P = X · Fr + Y · Fa

P = dynamic equivalent load [N]

Fr = radial load of the bearing [N]

Fa = thrust load of the bearing ]N]

X = radial factor

Y = axial factor

Factors X and Y are dependant on the contact angle. Increasing thrustload results in an increase of the ball contact angle, a (pressure angle).Hence, the thrust factor Y and the limiting value e depend on the ratiof0 · Fa/C0, at least in the case of a small contact angle (α <20°). ForBearings with a nominal contact angle of α ≥20°, the variation of theball contact angle resulting from higher thrust loads is negligible. Theradial factors as well as the thrust factors can be taken from the tablesbelow.

f0 = factor according to DIN ISO 76 taken from table below

C0 = static load rating of the single bearing

i = number of bearings

e = limiting value for Fa / Fr for selection of X and Y factors.

Series 719 USO, 70 USO, LK SO, PLK SOseries 719 USS, 70 USS in O- oder X-arrangement(contact angle α = 21º)

i

fi

2

1,62

3

2,16

4

2,64

e

0,57

X

1

Y

1,09

X

0,70

Y

1,63

Fa/Fr ≤ e Fa/Fr > e

e

0,57

X

1

Y

0

X

0,43

Y

1


X

1

Y

0

X

0,44

YFa/Fr ≤ e Fa/Fr > e

0,30,50,91,63,06,0

e

0,400,430,450,480,520,56

f0·Fa

i· C0

1,41,311,231,161,081


0,30,50,91,63,06,0

e

0,400,430,450,480,520,56

f0·Fa

C0

2,262,152,021,901,781,63

e

0,68

X

1

Y

0

X

0,41

Y

0,87


e

0,68

X

1

Y

0,92

X

0,67

Y

1,41


1,561,471,381,311,211,12


Lh (h)

500100020003000400050006000700080009000

fL

2,712,883,043,173,303,423,683,914,124,314,64

Lh (h)

1000012000140001600018000200002500030000350004000050000

fL

1,001,261,591,822,002,222,292,412,522,62

fL

3,0 - 4,53,0 - 4,02,5 - 3,53,5 - 4,52,5 - 3,02,0 - 3,03,0 - 4,03,5 - 4,5

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precision f1

UKF HQ/0 UKF HQ/I 1,00UKF 0/0 UKF 0/I 1,00UKF I/I UKF 1/1 0,80UKF 1/2 1) 0,75

preload f2

L 1,00M 0,85S 0,65

VARIORING 1,00...0,65

bearing arrangement with single row bearings

DTDBTBTQBCwith double row USO bearings (TBT) and QBC combined with USS)DBTBTQBC

* with respect to nlim of the USO bearing

Static loading

Index of static stressing fS

The index of static stressing fS is a safety factor, against prohibitivepermanent deformations at the contact areas of balls. Since spindlebearings are required to perform well above the standards of generalmachine construction, the index of static stressing should be higherthan 2,5

fS = i · Co

Po

fS = index of static stressingCo = static load rating of the single bearing [N]i = number of bearingsPo = static equivalent load [N]

Static equivalent load Po

The static equivalent load is assessed by the equations:

Po = Xo · Fr + Yo· Fa und Po = FrThe higher of the two values is to be used.Po = static equivalent load [N]Fr = radial load of the bearing [N]Fa = thrust load of the bearing [N]]Xo = radial factorYo = axial factor

The factors Xo and Yo depend on the contact angle and the arrangementof the bearings.

Series 719 USS, 70 USS as a single bearing or in tandem arrangement(contact angle α = 21º)Xo = 0,5 Yo = 0,41

Series 719 USO, 70 USO, P/LK SO ...2DB, series 719 USS, 70 USSin O- or X arrangementXo = 1 Yo = 0,82

Series 719 UHS / UHC...-A 15, 70 UHS /UHC ...-A 15(contact angle α = 15º)

as a single bearing or in tandem arrangementXo = 0,5 Yo = 0,46

for paired bearings in O or X arrangementXo = 1 Yo = 0,92

Series 719 UHS /UHC...-A 25, 70 UHS / UHC ...-A 25(contact angle α = 25º)

as a single bearing or in tandem arrangementXo = 0,5 Yo = 0,38

for paired bearings in O or X arrangementXo = 1 Yo = 0,76

1) for series K, UK, UL, UM

load direction preload

radial1)

axial

axial

rigid or elastic (deflection)

rigid

elastic (deflection)1) valid only for pure radial load.

X

1

Y

1,621,571,531,461,411,371,291,231,141,12

X

0,72

Y

2,362,282,222,112,031,971,861,761,661,63

Fa/Fr ≤ e Fa/Fr ≥ ee

≤ 0,020,030,040,060,080,100,150,200,30

≥ 0,50

e

0,390,400,410,430,450,470,490,520,550,56

2Fa

C0

Fab/Fv y1 y2

02/311

1101

Combined loads

Applications in which varying loads and / or speeds occur, the meandynamic equivalent load Pm must be calculated, with respect to therespective duration of each individual running condition.

Pm = (P13 · n1 · q1 + P2

3 · n2 · q2 + ....Pn3 · nn ·qn)/(nm · 100%)

nm = (n1 · q1 + n2 · q2 + ....nn · qn) / 100%

Pm = mean dynamic equivalent load [N]

nm = mean speed [rpm]

P1 ... Pn = dynamic equivalent loads of the individual running conditions [N]

n1 ... nn = speeds of the individual running conditions [rpm]

q1 ... qn = periods of time of the respective running conditions [%]

Attainable speeds

The attainable speed or permissible speed, respectively, of a bearingarrangement depends on many factors which have a decisive influenceon the limiting speed. Therefore, only the most important ones, whichcan easily be calculated, are discussed.

nmax = f1 · f2 · f3 · nlim

nmax = maximum attainable speed [rpm]nlim = limiting speed to be taken from the table [rpm]f1 = precision factorf2 = preload factorf3 = arrangement factor

f3

10,950,90,750,85

0,9*0,85*0,8

Resultant thrust load

With preloaded spindle bearings, the resulting axial load is the reactionthrust load and the preload itself.

Fa = y1Fab + y2Fv

Fa = resulting thrust load [N]

Fab = external thrust load (operational load) [N]

Fv = preload [N]y1, y2 = correction factors

factor fo

Series K, UK, UL, UM, LK, PLK, LS

factor fo

Factor fo for series 719 UHS/UHC...-A 15, 70 UHS/UHC...-A 15(contact angle α = 15°)


dmm

2025303540455055606570

719 UHS/UHC

15,516,016,416,416,516,316,216,316,216,116,1

70 UHS/UHC

15,215,715,716,016,416,416,516,516,516,416,5

dmm

75808590100110120130140150

719 UHS/UHC

16,116,016,216,116,116,016,016,116,016,1

70 UHS/UHC

16,516,516,416,416,316,416,316,516,416,4


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Part Number Designation for UKF Spindle Bearingsand Angular Contact Ball Bearings with Spacer Balls

62

70 USO 65. A21. 2Z. I/1. 2DB. S

XH 719 USSC 120. A21. . O/I. DT. M

70 UHC 70. A15. LB. O/I. DB. L

70 AFDC 40. - . I/1.

UL 30. A16. I/1.Prefix

XH CRONIDEX®

Bearing Arrangement d in mm

Contact Angles α

A 21 α = 21º Standard of USS(C), USO(C)

A 15 α = 15º, A 25 α = 25º A15 Standard of UHS, UHCA 16 α = 16º A16 Standard of K, UK, UL, UMA ... Custom contact angles 12°…30° as per agreement

Preload

L light

M medium

S heavy

alternative:individual preload as per agreement

Precision Class

HQ better than at present given Standard

O better than ISO 2, P2, ABEC 9

I better than ISO4, P4, ABEC 7(Standard of Spindle Bearings)

1, 1/2 better than ISO5, P5, ABEC 5(Standard of Spindle Bearings with Spacer Balls)

Frequently precision of rotating Inner Ring isselected one grade higher than the Outer Ring.e. g., O/I (I.R/O.R)

Dimension Series

718 Ultra Light (on request)

719 Light

70 Medium

Bearing Arrangement

U = Single Bearing, universalDU = Set of two, universalBearing Sets → page 4

Options

2 Z (or ZZ) shields, with gap to I.R.

LB lubrication bore through Outer Ring

Additional Special Requirement

marked radial runout Outer Ringmarked radial runout Inner Ring

dimensional variation of i.D. and o.D.

range of ΔD1 upper halftolerance D/d ΔD2 lower half

Δd1 upper halfΔd2 lower half

and:greased on requestnoise checked on request

w w w. u k f . d e

< -3/-2 >

Type Series

Spindle Bearings/Hybrid Spindle Bearings

USS Standard Spindle Bearingssingle row, Steel Balls

USO Standard Spindle Bearingsdouble row DB, Steel Balls

USSC Hybrid Spindle Bearingssingle row, Ceramic balls

USOC Hybrid Spindle Bearingsdouble row DB, Ceramic balls

High Speed-/Hybrid-Spindle Bearings

UHS High Speed Spindle Bearingssingle row, Steel balls

UHC HS-Hybrid Spindle Bearingssingle row, Ceramic balls

Floating Bearings with cylindrical racewayson Inner Ring, ceramic balls

AFSC single rowAFDC double row

Angular Contact Precision Bearings with Spacer Balls

K/UK internal standard, dimensional series 02, Series 70

UL dimensional 02, Series 72

UM dimensional 02, Series 73

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Part Number Designation of UKF Bearing Cartridges

63

LKSS 70. TBT. A21. 0/I. S. FA/2Z

LKSOC 50. 2DB. A21. I/1. L. VR

PLKHC 45. DB. A15. HQ/0. L. XH/WK

PLKLS 60. 2DF. A16. I/1. M. VS

Layout

LK with flangeBearings Series 70

PLK with collarBearings Series 719

Bearing Assemblies

SS Spindle Bearings single row

SO Spindle Bearings double row

SSC similar single row Hybrid Bearings

SOC similar double row Hybrid Bearings

HS High Speed Single Bearings

HC High Speed Hybrid Bearings

LS Bearing System 2 x 2 rows

with Spacer Balls

Bore d in mm

Bearing Arrangement

DB 2 Spindle Bearings, O-ArrangementDF 2 Spindle Bearings, X-Arrangement

TBT 3 Spindle Bearings

QBC 4 Spindle Bearings

2DB 2 Spindle Bearings double row

2DF Bearing System LS

PBC 5 Spindle Bearings

Contact Angles α

A 21 α = 21º Standard of USS(C), USO(C)

A 15 α = 15º, A 25 α = 25º A15 Standard of UHS, UHCA 16 α = 16º A16 Standard of K, UK, UL, UMA ... Individual contact angles 12°…30° as per agreement

Options

FA preloading springsSL air purgeTS sensor for temperatureVS sensor for vibrationVR VARIORING

(variable preload)WK water coolingXH bearings of

CRONIDEX®-steel2Z shields at both sides,

with gap

Preload

L light

M or without designation= medium

S heavyalternative:

individual preloadas per agreement

Precision class

HQ better than at present given Standard

0 better than ISO 2, P2, ABEC 9

I better than ISO 4, P4, ABEC 7(Standard of Spindle Bearings)

1, 1/2 better than ISO 5, P5, ABEC 5(Standard of Bearings with Spacer Balls)

Frequently the precision of rotating Inner Ringis specified one grade higher than of Outer Ring,e. g., O/I. (I.R/O.R)

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2437 UKF 64-U3 22.08.2013 11:14 Uhr Seite 1

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64

UKF Angular Contact High Precision Ball Bearings, double row, preloaded,

with rotating guidance by Spacer Balls according to Series (…) beginning with bore d

1) Angle of contact at an optimum α = 21° (on request 12°...30°) 2) Double row Bearing in O-arrangement DB

*) for inner diameter d: ...00 = ∅ 10 mm ...03 = ∅ 17 mm

...01 = ∅ 12 mm ...04 = ∅ 20 mm

...02 = ∅ 15 mm ...05 = ∅ 25 mm etc.

Comparison of Bearings based on a size of bore d = 25 mm. Basic Types and additional markings.

Inch mm

0,00001 0,00025(1/4 μm)

0,0001 0,0025

0,0002 0,005

0,0003 0,0075

0,0004 0,010

0,0005 0,013

0,0007 0,018

Inch mm

0,001 0,025

0,003 0,075

0,004 0,100

0,005 0,1125

0,007 0,18

0,010 0,25

0,015 0,40

0,020 0,50

1/32 0,75

1/16 1,5

1,0 25,4

ºC ºF

0º 32º

50º 122º

100º 212º

kp lb

0,454 1

1,0 2,203

N kp

1 0,102

Measurement Units

Comparison of Ball Screw Support Bearings

7905...7905...SN 247905...DB7905...SN24...DB

7005...7005...SN247005...DB7005...SN24...DB

------

------

------

CA5V1V------

SEB25...SEB25/NS...SEB25...DDSEB25/NS...DD

EX25...EX25/NS...EX25...DDEX 25/NS...DD

VEB25...VEB25/NS...

VEX25...VEX25/NS...

------

...1

...3---

..../H1

..../XN

S 61905...HYS 61905S 61905...DBHYS 61905...DB

S 6005...HYS 6005...S 6005...DBHYS 6005...DB

------

------

------

CE

KH...------

71905...71905...HC...71905...DB71905...HC...DB

7005...7005...HC7005...DB7005...HC...DB

71905 CE...71905 CE/HC...

7005 CE...7005 CE/HC

------

CD or CEACD---------

B 71905...HCB 71905...B 71905...DBHCB71905..DB

B 7005...HCB 7005...B 7005...DBHCB 7005...DB

HS 71905...HC 71905...

HS 7005...HC 7005...

FD 1005...---

CE

2RSDDLRX....

Basic Types

719 USS 25 1)

719 USSC 25 1)

719 USO 25 1) 2)

719 USOC 25 1) 2)

70 USS 25 1)

70 USSC 25 1)

70 USO 25 1) 2)

70 USOC 25 1) 2)

719 UHS 25719 UHC 25

70 UHS 2570 UHC 25

70 AFSC 2570 AFDC 25

additional markings:A 15A 252ZLB

XH....

NSK-RHP *) SKF/SNFA GMN *) SKF *) INA/FAG *) UKF

ZKLN......

GSXFSXFDX

Internal standard (<70): K 20 ...

DIN 628-5 ( 70): UK 20 ...

DIN 628-5 ( 72): UL 15 ...

DIN 628-5 ( 73): UM 17 ...

Comparison of Bearing Types, Units of Measurement

w w w. u k f . d e

2437 UKF 64-U3 22.08.2013 11:14 Uhr Seite 2

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UKF Service

Design assistance and after sales consultancy, specific bearing selection, special designs

upon request. Evaluation, relubricating of your spare stock bearings.

Reconditioning of used bearing cartridges.

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Certified and audited No. 07-24024995

TÜV Munich/RKW Berlin

UKF delivers

ex works Berlin, overnight by air

or ex stock from our distributors

abroad in Europe, overseas, Far East.

2437 UKF U1-U4 26.08.2013 11:37 Uhr Seite 1

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UKF delivers ex works Berlin, overnight by air or ex stockfrom our distributors abroad in Europe, overseas, Far East.

UNIVERSAL-KUGELLAGER-FABRIK GMBH

www.ukf.de


Angular Contact Ball Bearings with Spacer Balls

Bearing Cartridges


Documents

2437 UKF U2-01 - Startseite UKF - Universal-Kugellager ...ukf.de/images/ukf/downloads/Lagerkatalog_2014_engl.pdf2437 UKF 04-05 22.08.2013 12:27 Uhr Seite 1 Probedruck C M Y CM MY CY