Permissible Speed of Rotation
....The permissible speed of ratation of the ball bear units is connected with the fit between shaft and bearings. It is recommended that, under normal operating conditions, the fit between the bearings and the shaft be h7, the relevant values of permissible speed of rotation are shown in table 13. Looser fit allowing lower speed is recommended when lighter load is applied, while tighter tighter fit allowing highter speed is recommended when heavier load is applied.
 
bearings No.
Limit speed
bearings No.
Limit speed
UC HC SA SB UCX
CSA CSB SER UK
Grease Lubrication
UC UK
Grease Lubrication
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
4500
4500
4500
4000
3400
2800
2400
2200
1900
1800
1600
1500
1400
1300
1200
1100
1000
950
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
0
0
2800
2600
2200
2000
1800
1700
1400
1300
1200
1100
1000
950
900
850
800
0
0
0
 
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