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Speedy Open Creative Confidential Copyright © 2010 NSK Ltd. All Rights Reserved
Introduction of High Performance
Spherical Roller Bearing for
Vibrating Screen
NSK Ltd. http://www.nsk.com/
1
SG103383 June/2010
Industry Bearing Technology Department2
Speedy Open Creative Confidential Copyright © 2010 NSK Ltd. All Rights Reserved
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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Speedy Open Creative Confidential Copyright © 2010 NSK Ltd. All Rights Reserved
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
Speedy Open Creative Confidential Copyright © 2010 NSK Ltd. All Rights Reserved
◆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
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・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
Speedy Open Creative Confidential Copyright © 2010 NSK Ltd. All Rights Reserved
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
-18
NSK Old Suffix: C3U15-VS C4U15-VS
Speedy Open Creative Confidential Copyright © 2010 NSK Ltd. All Rights Reserved
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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