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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
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
Athens, Greece: 18, Gr. Lambraki Str., 141 23 Likovrisi. Tel: +302102817217. Fax: +302102814277. valiadis@valiadis.gr