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  » Products » Valiadis Motors » General Information » Permissible Radial Loads
Permissible Radial Loads
General Information

 

 

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
2160
1900
1690
250
2
5260
4660
4180
63
2,4
360
300
230
 
4
2140
1910
1720
 
4
5180
4590
4120
71
2,4,6
470
400
320
 
6
2450
2190
1970
 
6
5890
5220
4690
80
2
640
590
540
 
8
2700
2410
2180
 
8
6520
5780
5190
 
4
640
580
540
160
2
2790
2470
2210
280
2
5500
5000
4600
 
6
730
660
610
 
4
2770
2450
2190
 
4
5650
5150
4700
 
8
800
730
670
 
6
3150
2790
2490
 
6
6800
6300
5700
90
2
730
660
610
 
8
3480
3080
2750
 
8
7700
7200
6500
 
4
720
660
600
180
2
3130
2790
2510
315
2
5500
5000
4600
 
6
820
750
680
 
4
3070
2740
2470
 
4
6200
5700
5200
 
8
910
820
750
 
6
3500
3120
2810
 
6
7350
6700
6150
100
2
1020
910
830
 
8
3870
3450
3110
 
8
8350
7600
6950
 
4
1010
910
820
200
2
4160
3730
3390
355
2
12500
12000
11750
 
6
1150
1030
940
 
4
4130
3700
3360
 
4
28300
25860
14290
 
8
1270
1140
1030
 
6
4690
4210
3820
 
6
32400
29600
16350
112
2
1480
1350
1240
 
8
5190
4650
4220
 
8
35660
32580
18000
 
4
1470
1340
1230
225
2
4700
4260
3890
400
2
 
 
 
 
6
1680
1530
1410
 
4
4620
4080
3650
 
4
33730
31140
19280
 
8
1850
1680
1550
 
6
5250
4630
4150
 
6
38610
35650
22070
 
 
 
 
 
 
 
8
5820
5130
4590
 
 
8
42500
39240
24290

 

 

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
1500
1500
1620
1430
250
2
3100
3100
3940
2260
63
2,4
250
250
260
230
 
4
1780
1780
1970
1610
 
4
3900
3900
5000
2800
71
2,4,6
270
270
290
255
 
6
1820
1820
2000
1660
 
6
4450
4450
5570
3230
80
2
380
380
400
360
 
8
1920
1920
2100
1760
 
8
4980
4980
6380
3580
 
4
470
470
490
450
160
2
1650
1650
1950
1350
280
2
5300
3100
6500
2100
 
6
590
590
620
560
 
4
2100
2100
2470
1720
 
4
6300
4400
7800
3000
 
8
620
620
650
595
 
6
2450
2450
2800
2050
 
6
6700
4300
7900
2900
90
2
440
440
470
410
 
8
2650
2650
3050
2210
 
8
7100
5020
9100
3520
 
4
550
550
600
510
180
2
2100
2100
2450
1720
315
2
5900
3800
8000
2000
 
6
620
620
680
460
 
4
2600
2600
3200
2000
 
4
7100
5100
10700
3150
 
8
640
640
700
580
 
6
2900
2900
3510
2280
 
6
7600
5800
11800
3500
100
2
610
610
670
570
 
8
3170
3170
3780
2550
 
8
8100
6300
12500
4400
 
4
750
750
840
710
200
2
2400
2400
2940
1840
355
2
6100
1850
14000
800
 
6
880
880
970
820
 
4
3120
3120
3850
2390
 
4
9800
3900
18300
2500
 
8
895
895
970
845
 
6
3480
3480
4350
2610
 
6
10500
4700
20700
3500
112
2
1220
1220
1300
1170
 
8
3950
3950
4810
3090
 
8
12500
6000
21500
3600
 
4
1440
1440
1520
1370
225
2
2720
2720
3420
2020
400
2
 
 
 
 
 
6
1650
1650
1740
1580
 
4
3480
3480
4370
2590
 
4
11200
3900
18500
1600
 
8
1780
1780
1880
1710
 
6
3890
3890
5040
2820
 
6
12500
4800
19500
2200
 
 
 
 
 
 
 
 
8
4330
4330
5330
3330
 
 
8
12800
4950
21500
2900
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