|
The following table gives the permissible radial force in Newton, assuming zero axial force and standard ball bearings. In case of higher radial force than given in the table an reinforced bearing should be ordered. The values are based on normal conditions at 50Hz and calculated at 20.000 working hours for the 2-pole motors and 40.000 working hours for the 4p, 6p, 8p motors.
For 60Hz the value must be reduced by 10%.
For two speed motors, the values have to be based at the higher speed.
In order to calculate the actual force on a motor shaft, we use the following formula:
Where:
M: is the rated torque of the motor 
D: is the pulley diameter [m]
K: belt tension factor. K=2.2 - 3 for V-belts or flat belts.
|
Frame size
|
Pole
|
Permissible radial load
|
|
Frame size
|
Pole
|
Permissible radial load
|
|
Frame size
|
Pole
|
Permissible radial load
|
|
|
|
At Xo
|
At X1/2
|
At Xmax
|
|
|
At Xo
|
At X1/2
|
At Xmax
|
|
|
At Xo
|
At X1/2
|
At Xmax
|
|
56
|
2/4
|
250
|
180
|
100
|
132
|
2
|
2,160
|
1,900
|
1,690
|
250
|
2
|
5,260
|
4,660
|
4,180
|
|
63
|
2/4
|
360
|
300
|
230
|
|
4
|
2,140
|
1,910
|
1,720
|
|
4
|
5,180
|
4,590
|
4,120
|
|
71
|
2/4/6
|
470
|
400
|
320
|
|
6
|
2,450
|
2,190
|
1,970
|
|
6
|
5,890
|
5,220
|
4,690
|
|
80
|
2
|
640
|
590
|
540
|
|
8
|
2,700
|
2,410
|
2,180
|
|
8
|
6,520
|
5,780
|
5,190
|
|
|
4
|
640
|
580
|
540
|
160
|
2
|
2,790
|
2,470
|
2,210
|
280
|
2
|
5,500
|
5,000
|
4,600
|
|
|
6
|
730
|
660
|
610
|
|
4
|
2,770
|
2,450
|
2,190
|
|
4
|
5,650
|
5,150
|
4,700
|
|
|
8
|
800
|
730
|
670
|
|
6
|
3,150
|
2,790
|
2,490
|
|
6
|
6,800
|
6,300
|
5,700
|
|
90
|
2
|
730
|
660
|
610
|
|
8
|
3,480
|
3,080
|
2,750
|
|
8
|
7,700
|
7,200
|
6,500
|
|
|
4
|
720
|
660
|
600
|
180
|
2
|
3,130
|
2,790
|
2,510
|
315
|
2
|
5,500
|
5,000
|
4,600
|
|
|
6
|
820
|
750
|
680
|
|
4
|
3,070
|
2,740
|
2,470
|
|
4
|
6,200
|
5,700
|
5,200
|
|
|
8
|
910
|
820
|
750
|
|
6
|
3,500
|
3,120
|
2,810
|
|
6
|
7,350
|
6,700
|
6,150
|
|
100
|
2
|
1,020
|
910
|
830
|
|
8
|
3,870
|
3,450
|
3,110
|
|
8
|
8,350
|
7,600
|
6,950
|
|
|
4
|
1,010
|
910
|
820
|
200
|
2
|
4,160
|
3,730
|
3,390
|
355
|
2
|
12,500
|
12,000
|
11,750
|
|
|
6
|
1,150
|
1,030
|
940
|
|
4
|
4,130
|
3,700
|
3,360
|
|
4
|
28,300
|
25,860
|
14,290
|
|
|
8
|
1,270
|
1,140
|
1,030
|
|
6
|
4,690
|
4,210
|
3,820
|
|
6
|
32,400
|
29,600
|
16,350
|
|
112
|
2
|
1,480
|
1,350
|
1,240
|
|
8
|
5,190
|
4,650
|
4,220
|
|
8
|
35,660
|
32,580
|
18,000
|
|
|
4
|
1,470
|
1,340
|
1,230
|
225
|
2
|
4,700
|
4,260
|
3,890
|
400
|
2
|
|
|
|
|
|
6
|
1,680
|
1,530
|
1,410
|
|
4
|
4,620
|
4,080
|
3,650
|
|
4
|
33,730
|
31,140
|
19,280
|
|
|
8
|
1,850
|
1,680
|
1,550
|
|
6
|
5,250
|
4,630
|
4,150
|
|
6
|
38,610
|
35,650
|
22,070
|
|
|
|
|
|
|
|
|
8
|
5,820
|
5,130
|
4,590
|
|
|
8
|
42,500
|
39,240
|
24,290
|
The following table gives the permissible axial forces in Nt, assuming zero radial force. In case axial & radial forces apply together, please consult our engineering department. For higher axial forces, it is possible to execute the motors with angular contact bearings. The values are based for normal conditions at 50Hz and calculated at 20.000 working hours for 2-pole motors and 40.000 working hours for 4p, 6p, 8p motors. At 60Hz, the values must be decreased by 10%. For double speed motors the values have to be based at the higher speed.
KA-A motors have their own table for permissible axial loads, since angular contact bearings are standard for this series.
|
Maximum axial force [N]
|
|
Maximum axial force [N]
|
|
Maximum axial force [N]
|
|
Frame
size
|
Pole
|
B3
Push
|
B3
Pull
|
V1
Push
|
V1
Pull
|
Frame
size
|
Pole
|
B3
Push
|
B3
Pull
|
V1
Push
|
V1
Pull
|
Frame
size
|
Pole
|
B3
Push
|
B3
Pull
|
V1
Push
|
V1
Pull
|
|
56
|
2/4
|
200
|
200
|
230
|
180
|
132
|
2
|
1,500
|
1,500
|
1,620
|
1,430
|
250
|
2
|
3,100
|
3,100
|
3,940
|
2,260
|
|
63
|
2/4
|
250
|
250
|
260
|
230
|
|
4
|
1,780
|
1,780
|
1,970
|
1,610
|
|
4
|
3,900
|
3,900
|
5,000
|
2,800
|
|
71
|
2/4/6
|
270
|
270
|
290
|
255
|
|
6
|
1,820
|
1,820
|
2,000
|
1,660
|
|
6
|
4,450
|
4,450
|
5,570
|
3,230
|
|
80
|
2
|
380
|
380
|
400
|
360
|
|
8
|
1,920
|
1,920
|
2,100
|
1,760
|
|
8
|
4,980
|
4,980
|
6,380
|
3,580
|
|
|
4
|
470
|
470
|
490
|
450
|
160
|
2
|
1,650
|
1,650
|
1,950
|
1,350
|
280
|
2
|
5,300
|
3,100
|
6,500
|
2,100
|
|
|
6
|
590
|
590
|
620
|
560
|
|
4
|
2,100
|
2,100
|
2,470
|
1,720
|
|
4
|
6,300
|
4,400
|
7,800
|
3,000
|
|
|
8
|
620
|
620
|
650
|
595
|
|
6
|
2,450
|
2,450
|
2,800
|
2,050
|
|
6
|
6,700
|
4,300
|
7,900
|
2,900
|
|
90
|
2
|
440
|
440
|
470
|
410
|
|
8
|
2,650
|
2,650
|
3,050
|
2,210
|
|
8
|
7,100
|
5,020
|
9,100
|
3,520
|
|
|
4
|
550
|
550
|
600
|
510
|
180
|
2
|
2,100
|
2,100
|
2,450
|
1,720
|
315
|
2
|
5,900
|
3,800
|
8,000
|
2,000
|
|
|
6
|
620
|
620
|
680
|
460
|
|
4
|
2,600
|
2,600
|
3,200
|
2,000
|
|
4
|
7,100
|
5,100
|
10,700
|
3,150
|
|
|
8
|
640
|
640
|
700
|
580
|
|
6
|
2,900
|
2,900
|
3,510
|
2,280
|
|
6
|
7,600
|
5,800
|
11,800
|
3,500
|
|
100
|
2
|
610
|
610
|
670
|
570
|
|
8
|
3,170
|
3,170
|
3,780
|
2,550
|
|
8
|
8,100
|
6,300
|
12,500
|
4,400
|
|
|
4
|
750
|
750
|
840
|
710
|
200
|
2
|
2,400
|
2,400
|
2,940
|
1,840
|
355
|
2
|
6,100
|
1,850
|
14,000
|
800
|
|
|
6
|
880
|
880
|
970
|
820
|
|
4
|
3,120
|
3,120
|
3,850
|
2,390
|
|
4
|
9,800
|
3,900
|
18,300
|
2,500
|
|
|
8
|
895
|
895
|
970
|
845
|
|
6
|
3,480
|
3,480
|
4,350
|
2,610
|
|
6
|
10,500
|
4,700
|
20,700
|
3,500
|
|
112
|
2
|
1,220
|
1,220
|
1,300
|
1,170
|
|
8
|
3,950
|
3,950
|
4,810
|
3,090
|
|
8
|
12,500
|
6,000
|
21,500
|
3,600
|
|
|
4
|
1,440
|
1,440
|
1,520
|
1,370
|
225
|
2
|
2,720
|
2,720
|
3,420
|
2,020
|
400
|
2
|
|
|
|
|
|
|
6
|
1,650
|
1,650
|
1,740
|
1,580
|
|
4
|
3,480
|
3,480
|
4,370
|
2,590
|
|
4
|
11,200
|
3,900
|
18,500
|
1,600
|
|
|
8
|
1,780
|
1,780
|
1,880
|
1,710
|
|
6
|
3,890
|
3,890
|
5,040
|
2,820
|
|
6
|
12,500
|
4,800
|
19,500
|
2,200
|
|
|
|
|
|
|
|
|
|
8
|
4,330
|
4,330
|
5,330
|
3,330
|
|
|
8
|
12,800
|
4,950
|
21,500
|
2,900
|
|
