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Introduction of High Performance

Spherical Roller Bearing for

Vibrating Screen

NSK Ltd. http://www.nsk.com/

1

SG103383 June/2010

Industry Bearing Technology Department2

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Material Technology

State-of-the-art material technology through detailed research of raw material

Manufacturing Technology

The most advanced production system guarantees outstanding quality control

Design Technology

Proprietary NSK design

through advanced

Analytical technology

By mobilizing NSK’s world-class technologies such as design technology, material

technology, and manufacturing technology, NSK has developed the next generation of high performance SRB for Vibrating Screen.

１．High Performance SRB for Vibrating Screen

Features of High Performance SRB for VS ～In comparison with NSK conventional SRB～ ・Bearing life： More than 2 times ・Dynamic load rating： Increased by 25％ UP

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Single Shaft (Single shaft imparts

circular motion to screen)

２-１. What is a vibrating screen?

Bearing arrangement

Brg Load ： small size：P/C=0.10～0.15 ： large size：P/C=0.10～0.18 Lubrication ： Oil bath VG100～220 (Small size：Grease partially) Rotating speed ： small size；Ｎ=750～1100 min-1 ： large size；Ｎ=500～ 900 min-1

Fitting ：

Structure

Under vibrating condition

Inner ring rotation/rotating outer ring load

Centrifugal force acts on bearing

Operation condition

Vibrating screen is the equipment to sort out by screening.

Double Shaft

Unbalance weight

(Two shafts imparts linear

motion or circular motion

to screen)

Brg

Screen

Spring

NSK own test equipment

３

Eccentric shaft

Part Bearing size Recommendation

Shaft 22308～16 g6 22317～38 f6

Housing 22308～14 N6 22315～38 P6

Bearing type：SRB 223XX series

amplitude

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◆Required functions of high performance SRB for VS

Inner ring

Roller

NSK achieved the required performance described above by the technologies adopted to NSKHPS-EA*1 and investigation of optimum specifications

Finishing marks on outer ring raceway differs from that of conventional bearing

３．Specification of high performance SRB for Vibrating Screen

６

・Bearing life：2 times ・High reliability

*1：NSKHPS TM

SRB Series

Internal clearance

Cage

・Control of ID tolerance ⇒ Control of abnormal thrust load

・Control of OD tolerance ⇒ Control of Creep、Fretting

Long life、 high reliability

Outer ring

・Internal clearance range decreased to 2/3 (upper side)

・Special processing of raceway ・Optimum design for raceway radius ・Optimum specification of surface roughness ・Special tolerance of outer diameter

・Machine brass cage

・Optimum design for body radius of roller ・Improvement of surface roughness

・Optimum design for raceway radius ・Improvement of surface roughness ・Special tolerance of bore diameter

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５． High performance SRB for Vibrating Screen: Tolerance/Inter Clearance

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•Internal Clearance decreased to 2/3 ⇒ Control of Heat Generation

•ID & OD tolerance decreased to1/2

⇒ Control of abnormal Thrust Load

Control of Creep、Fretting (Wear proof of housing)

旧NSK C3U15-VS C4U15-VS

Bore Diameter Outside Diameter Radial Internal Clearance

(Cylindrical Bore)

Bearing Numbers

Nominal (mm)

Tolerance (μm)

Nominal (mm)

Tolerance (μm)

VS3 (μm)

VS4 (μm)

22308 40 0 -7

90 50～60 65～80 22309 45 100 60～75 85～100 22310 50 110 -5 22311 55 120 -13 75～90 100～120 22312 60 0 130 22313 65 -9 140 22314 70 150 90～110 120～145 22315 75 160 -5 22316 80 170 -18 22317 85 180 110～135 150～180 22318 90 190 22319 95 0 200 22320 100 -12 215 -10 22322 110 240 -23 135～160 180～210 22324 120 260 22326 130 280 160～190 205～240 22328 140 300 22330 150 0 320 190～220 240～280 22332 160 -15 340 -13 22334 170 360 -28 200～240 260～310 22336 180 380

22338 190 0 400 220～260 285～340

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NSK Old Suffix： C3U15-VS C4U15-VS

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Bearing nomenclature： 223 20 E4 CAM -VS3(4)

Bearing series

Bore Diameter Number

Bearing Design CAM : Machined brass cage Oil Groove & Holes in Outer ring

Bore O .D. W idth Ｃｒ Ｃｏｒ

4 0 9 0 3 3 2 2 3 0 8 C AM E4 - VS3 2 2 3 0 8 C AM E4 - VS4 1 5 2 0 0 0 1 2 9 0 0 04 5 1 0 0 3 6 2 2 3 0 9 C AM E4 - VS3 2 2 3 0 9 C AM E4 - VS4 1 8 5 0 0 0 1 6 7 0 0 05 0 1 1 0 4 0 2 2 3 1 0 C AM E4 - VS3 2 2 3 1 0 C AM E4 - VS4 2 3 2 0 0 0 2 1 1 0 0 05 5 1 2 0 4 3 2 2 3 1 1 C AM E4 - VS3 2 2 3 1 1 C AM E4 - VS4 2 6 1 0 0 0 2 4 1 0 0 06 0 1 3 0 4 6 2 2 3 1 2 C AM E4 - VS3 2 2 3 1 2 C AM E4 - VS4 3 0 5 0 0 0 2 8 8 0 0 06 5 1 4 0 4 8 2 2 3 1 3 C AM E4 - VS3 2 2 3 1 3 C AM E4 - VS4 3 3 0 0 0 0 3 1 5 0 0 07 0 1 5 0 5 1 2 2 3 1 4 C AM E4 - VS3 2 2 3 1 4 C AM E4 - VS4 3 8 0 0 0 0 3 7 0 0 0 07 5 1 6 0 5 5 2 2 3 1 5 C AM E4 - VS3 2 2 3 1 5 C AM E4 - VS4 4 2 5 0 0 0 4 1 5 0 0 08 0 1 7 0 5 8 2 2 3 1 6 C AM E4 - VS3 2 2 3 1 6 C AM E4 - VS4 4 8 5 0 0 0 4 8 0 0 0 08 5 1 8 0 6 0 2 2 3 1 7 C AM E4 - VS3 2 2 3 1 7 C AM E4 - VS4 5 2 0 0 0 0 5 1 0 0 0 09 0 1 9 0 6 4 2 2 3 1 8 C AM E4 - VS3 2 2 3 1 8 C AM E4 - VS4 6 0 5 0 0 0 5 9 5 0 0 09 5 2 0 0 6 7 2 2 3 1 9 C AM E4 - VS3 2 2 3 1 9 C AM E4 - VS4 6 5 5 0 0 0 6 7 5 0 0 01 0 0 2 1 5 7 3 2 2 3 2 0 C AM E4 - VS3 2 2 3 2 0 C AM E4 - VS4 7 5 0 0 0 0 7 8 5 0 0 01 1 0 2 4 0 8 0 2 2 3 2 2 C AM E4 - VS3 2 2 3 2 2 C AM E4 - VS4 9 2 5 0 0 0 9 8 0 0 0 01 2 0 2 6 0 8 6 2 2 3 2 4 C AM E4 - VS3 2 2 3 2 4 C AM E4 - VS4 1 0 6 0 0 0 0 1 1 2 0 0 0 01 3 0 2 8 0 9 3 2 2 3 2 6 C AM E4 - VS3 2 2 3 2 6 C AM E4 - VS4 1 2 4 0 0 0 0 1 3 5 0 0 0 01 4 0 3 0 0 1 0 2 2 2 3 2 8 C AM E4 - VS3 2 2 3 2 8 C AM E4 - VS4 1 4 5 0 0 0 0 1 5 9 0 0 0 01 5 0 3 2 0 1 0 8 2 2 3 3 0 C AM E4 - VS3 2 2 3 3 0 C AM E4 - VS4 1 5 3 0 0 0 0 1 6 9 0 0 0 01 6 0 3 4 0 1 1 4 2 2 3 3 2 C AM E4 - VS3 2 2 3 3 2 C AM E4 - VS4 1 7 0 0 0 0 0 1 9 0 0 0 0 01 7 0 3 6 0 1 2 0 2 2 3 3 4 C AM E4 - VS3 2 2 3 3 4 C AM E4 - VS4 1 9 7 0 0 0 0 2 1 1 0 0 0 01 8 0 3 8 0 1 2 6 2 2 3 3 6 C AM E4 - VS3 2 2 3 3 6 C AM E4 - VS4 2 1 7 0 0 0 0 2 3 4 0 0 0 01 9 0 4 0 0 1 3 2 2 2 3 3 8 C AM E4 - VS3 2 2 3 3 8 C AM E4 - VS4 2 3 7 0 0 0 0 2 5 9 0 0 0 0

Basic Load Ratings(N )Boundary Dim ensions(m m )Bearing N um bers

Symbol for Vibrating screen

•Special tolerance for VS

•Internal clearance for VS

６. High performance SRB for Vibrating Screen : Line-up

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Providing value

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