236312191 1 Bearing Types Ppt

7/24/2019 236312191 1 Bearing Types Ppt

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Bearing Types


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History of Inventions ofRolling Element Bearings


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Primary Function of Bearings

Transmit loads Reduce Friction Secondary roles

Support the shaft Locate the shaft


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Bearing Loads


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Roller and Ball Raceway Contact


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Types of Rolling lements

$pheri#al roller%asymmetri#al&$pheri#al roller%symmetri#al&Ball

Taper roller

'eedle roller

(ylindri#al roller


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Bearing Components!"eep #roo$e Ball Bearing%

$eal Rolling Elements Inner Ring!"ter ring (age $eal


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(hara#teristi#s

Deep grooveball bearing

Angularcontactball bearing

Self-aligningball bearing

Ball bearings Point (onta#t )

* ess area of #onta#t* ess fri#tion

* +ore speed* ess load

Cylindricalroller

bearing

Taper roller

bearing

Needleroller

bearing

Sphericalroller

bearing

Roller bearingsine (onta#t )

* +ore area of #onta#t* +ore fri#tion* ess speed

* +ore load


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Bearing Loads


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Radial rolling bearings

Deep grooveball bearing

Angularcontactball bearing

Self-aligningball bearing

Cylindricalroller bearing

Taper roller bearing

Needleroller bearing

Sphericalrollerbearing

Ball bearings Roller bearings

Radial rolling bearings


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Thr"st ball bearing

Ball bearings Roller bearings

Thr"st bearings

,ng"lar(onta#tBall Thr"stbearing

Taper Roller

Thr"st

bearing

$pheri#al Roller

Thr"st

bearing

(ylindri#al - 'eedle Roller

Thr"st bearing


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Bore

Bore s"rfa#e

!./. s"rfa#e

!./.

Bearing Terminology


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Inner ring ra#eway

$ide fa#es

Inner ring land

!"ter ring ra#eway !"ter ring land

Bearing Terminology


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Ball and Roller Bearing Ranges

/eep groove

Ball bearingsRoller bearings+

,ng"lar#onta#t

$elf0aligning (ylindri#al Taper 'eedle $pheri#al


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oad (apabilities

oad #arrying #apa#ityis expressed as the basi#dynami# load rating


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Relati$e Speed Limitations

1rease l"bri#ationspeed rating

!il l"bri#ationspeed rating

r-min


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Bearing (onta#t ,ngle

Single Cylindrical Angular Taper Spherical Row Roller Contact Roller Roller

Radial Loads Combined Loads


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Bearing (omponents&uter Ring

'nner Ring

Cage

Rolling lement


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Closures( Shields


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)on Contact Seal

R2


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Land Riding Lip Seal

R$3


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Rolling Bearings are Precision Products

1

How much is a ?

Ahumanhair

0,06 mmStandard

High precisionbearing

Precisionbearing

Normal

P6 P6SP

P4AUP

PA9APA9B

Toleranceclasses

0/-15 m0/-12 m 0/-9 m

0/-7 m0/-2,5 m


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Precision Classes Pre#ision #lasses) 4$ vis0a0vis E"rope

,BE( I$!

3 'ormal

5 P6 7 P7

8 P9

: P:

1enerally; "se bearings no more than one pre#ision#lass better than the pre#ision of the mating#omponents

Extra pre#ision has no benefit if applied to poorlymade mating #omponents


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Radial#learan#e

,xial#learan#e

Internal (learan#es


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Bearing Basi#s

(3 0 ess than (< #learan#e(< 0 less than normal #learan#e %('; (=& 0normal #learan#e %not generallymar>ed&

(5 0 greater than normal #learan#e%?standard@&

(9 0 greater than (5 #learan#e

(7 0 greater than (9 #learan#e

Example), 6

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236312191 1 Bearing Types Ppt