3.3.4 Bearing Life and Lubrication
The life expectancy of the ball bearings is according to
and
, when the following conditions are fulfilled:
•
Temperature of 80
°
C (176
°
F).
•
Radial forces in load point corresponding to half-shaft extension do not exceed the values specified in
and
IE2 50 Hz 3-phase motors
Permissible radial forces Permissible axial forces
(IMB3)
Permissible axial forces
(IMV1)
Permissible axial
forces (IMV1)
Both directions
Force upwards
Force downwards
20000 h
40000 h
20000 h
40000 h
20000 h
40000 h
20000 h
40000 h
Motor size
Number of poles
F rad [N]
F rad [N]
F ax [N]
F ax [N]
F ax [N]
F ax [N]
F ax [N]
F ax [N]
71
2
460
370
230
175
260
205
210
170
4
580
465
330
250
350
275
300
240
80
2
590
475
320
255
340
280
290
220
4
830
665
440
350
470
380
410
310
90
2
670
535
340
260
380
315
310
235
4
940
750
480
365
470
385
440
330
100
2
920
735
480
360
540
460
430
325
4
1290
1030
680
530
740
620
620
465
112
2
930
745
480
380
560
475
400
300
4
1300
1040
680
540
750
630
600
450
132 S
2
1350
1080
800
625
1000
845
610
460
4
1900
1520
1130
880
1320
1095
930
700
132 M
2
1400
1120
780
610
990
835
580
435
4
1970
1575
1090
850
1300
1080
890
670
160 M
2
1550
1240
840
685
1180
975
500
395
4
2170
1735
1180
950
1520
1245
830
640
160 L
2
1580
1265
820
675
1180
980
460
365
4
2220
1775
1150
925
1510
1245
790
610
Table 3.6 Permissible Forces, IE2 50 Hz 3-phase Motors
Permissible radial forces: Load point corresponding to half-shaft extension, 0 axial force assumed.
Permissible axial forces: 0 radial force assumed.
Permissible loads of simultaneous radial and axial forces can be supplied on request.
System Integration
Design Guide
MG03M202
Danfoss A/S © 06/2016 All rights reserved.
35
3
3
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