Mitsubishi Electric JR Series Instruction Manual page 11

(2) Use an arm-type pulley that has a ventilation hole so that the pulley does not obstruct the
ventilation cooling. Provide as large as possible of a ventilation hole if a flat plate type is to be used.
(Refer to Fig. 5.)
(3) The V-Belt speed is as follows.
Standard V-belt max. 30m/s (Max. pulley diameter for 4-pole motor is 320.)
Narrow V-belt max. 40m/s
(4) Select the gear-ratio so that the contact angle ø of the belt and pulley is 140° or higher.
(Refer to Fig. 4.)
Table 4 Application of V-belt and V-pulley and the deflection force for standard motors
(Contact angle 140°)
Rate
No. of
Nominal
output
No. of
poles Model
diameter
kW belts
value)
0.2 2 A 1
0.4 2 A 1
0.75 2 A 1
1.5 2 A 2
2.2 2 A 2
3.7 2 A 3
5.5 2 A 3
2 A 3
7.5
0.2 4 A 1
0.4 4 A 1
0.75 4 A 1
1.5 4 A 2
A 2
2.2 4
3.7 4 A 3
5.5 4 B 3
4 B 3
7.5
11 4 B 4
15 4 B 5
18.5 4 B 5
22 4 B 5
30 4 C 5
37 4 C 6
6
45 4 C
55 4 C 7
75 4 C 8
0.4 6 A 1
0.75 6 A 2
1.5 6 A 2
2.2 6 A 3
3.7 6 B 3
5.5 6 B 3
7.5 6 B 4
11 6 B 5
B 5
15 6
18.5 6 C 4
22 6 C 5
30 6 C 5
37 6 C 6
45 6 C 7
55 6 C 8
75 6 D 6
2
0.75 8 A
1.5 8 A 3
2.2 8 A 3
8 B 3
3.7
5.5 8 B 4
7.5 8 B 5
11 8 B 5
15 8 C 4
18.5 8 C 5
22 8 C 5
6
30 8 C
37 8 C 7
45 8 C 7
(Max. pulley diameter for 4-pole motor is 425.)
Standard V-belt
Pulley Deflection force Td (N/pcs)
Width
(max. For new belt
(min.
value)
75 20 2.9 to 3.4
75 20 4.4 to 5.4
80 20 6.9 to 7.8
80 35 7.8 to 8.8
90 35 9.8 to 11
90 50 9.8 to 12
112 50 13 to 15
132 50 15 to 18
75 20 3.9 to 4.4
75 20 6.9 to 7.8
80 20 11 to 13
90 35 11 to 12
100 35 14 to 16
112 50 14 to 16
125 63 19 to 22
150 63 22 to 25
23 to 25
160 82
170 101 24 to 26
200 101 25 to 28
224 101 27 to 31
224 136 39 to 45
224 161.5 40 to 46
265 161.5 44 to 51
265 187 46 to 53
315 212.5 51 to 59
80 20 8.8 to 9.8
80 35 8.8 to 9.8
14 to 16
100 35
100 50 13 to 15
125 63 18 to 21
150 63 23 to 25
150 82 23 to 25
170 101 24 to 27
224 101 25 to 29
224 110.5 39 to 45
224 136 38 to 43
265 136 44 to 51
45 to 52
265 161.5
280 187 45 to 52
300 212.5 46 to 53
355 233 78 to 90
80 35 11 to 13
95 50 13 to 15
112 50 16 to 18
132 63 23 to 25
150 82 22 to 25
150 101 24 to 27
200 101 26 to 30
110.5 40 to 46
224
224 136 40 to 46
250 136 43 to 49
265 161.5 46 to 53
280 187 46 to 53
315 187 51 to 58
Nominal
No. of
Model
For diameter
belts
retensioning
value)
2.5 to 2.9 3V 1
3.4 to 4.4 3V 1
5.4 to 6.9 3V 1
5.9 to 7.8 3V 1
7.8 to 9.8 3V 1
7.8 to 9.8 3V 2
9.8 to 13 3V 3
12 to 15 3V 4
2.9 to 3.9 3V 1
5.4 to 6.9 3V 1
1
8.8 to 11 3V
7.8 to 11 3V 2
11 to 14 3V 2
11 to 14 3V 2
15 to 19 3V 3
17 to 22 3V 3
18 to 23 3V 4
18 to 24 3V 6
20 to 25 3V 6
22 to 27 3V 6
5V 4
30 to 39
31 to 40 5V 4
34 to 44 5V 4
36 to 46 5V 5
39 to 51 5V 6
6.9 to 8.8 3V 1
6.9 to 8.8 3V 1
11 to 14 3V 2
11 to 13 3V 2
14 to 18 3V 3
18 to 23 3V 3
18 to 23 3V 4
19 to 24 3V 5
20 to 25 3V 6
5V 3
30 to 39
29 to 38 5V 4
34 to 44 5V 4
35 to 45 5V 4
35 to 45 5V 5
36 to 46 5V 6
61 to 78 5V 6
8.8 to 11 3V 2
2
9.8 to 13 3V
12 to 16 3V 3
18 to 23 3V 3
17 to 22 3V 4
19 to 24 3V 5
21 to 26 3V 6
31 to 40 5V 3
31 to 40 5V 4
33 to 43 5V 4
36 to 46 5V 5
5
36 to 46 5V
39 to 51 5V 6
- 6 -
Narrow V-belt
Pulley Deflection force, Td (N/pcs)
Width
(max. For new belt
(min.
value)
71 17.4 2.9 to 3.4
71 17.4 4.4 to 4.9
71 17.4 6.9 to 7.8
75 17.4 13 to 15
75 17.4 18 to 21
75 27.7 16 to 18
75 38.0 16 to 18
80 48.3 15 to 18
71 17.4 3.9 to 4.4
71 17.4 6.9 to 7.8
71 17.4 13 to 15
75 27.7 13 to 15
75 27.7 18 to 21
100 27.7 23 to 25
100 38.0 22 to 25
125 38.0 24 to 27
125 48.3 26 to 30
125 68.9 24 to 27
140 68.9 26 to 30
160 68.9 27 to 31
180 77.9 52 to 60
200 77.9 58 to 67
224 77.9 63 to 73
224 95.4 62 to 71
250 112.9 64 to 74
71 17.4 9.8 to 12
75 17.4 18 to 20
75 27.7 18 to 21
22 to 25
90 27.7
100 38.0 22 to 25
140 38.0 24 to 26
140 48.3 24 to 27
140 58.6 27 to 31
160 68.9 27 to 31
180 60.4 62 to 71
180 77.9 55 to 64
224 77.9 61 to 70
224 77.9 74 to 84
224 95.4 72 to 82
250 112.9 67 to 77
315 112.9 73 to 83
75 27.7 13 to 14
80 27.7 23 to 25
90 38.0 20 to 23
125 38.0 24 to 26
140 48.3 24 to 26
140 58.6 25 to 28
160 68.9 26 to 30
180 60.4 66 to 76
77.9 61 to 70
180
200 77.9 65 to 75
224 95.4 64 to 73
250 95.4 70 to 80
250 112.9 71 to 81
For
retensioning
2.5 to 2.9
3.4 to 4.4
5.9 to 6.9
9.8 to 13
14 to 18
13 to 16
13 to 16
12 to 15
2.9 to 3.9
5.4 to 6.9
9.8 to 13
9.8 to 13
14 to 18
18 to 23
17 to 22
19 to 24
21 to 26
19 to 24
21 to 26
22 to 27
41 to 52
45 to 58
49 to 63
48 to 62
50 to 64
7.8 to 9.8
14 to 18
14 to 18
17 to 22
17 to 22
19 to 24
19 to 24
22 to 27
22 to 27
48 to 62
43 to 55
47 to 61
57 to 74
56 to 72
52 to 67
57 to 73
9.8 to 13
18 to 23
15 to 20
18 to 24
18 to 24
20 to 25
21 to 26
51 to 66
47 to 61
51 to 65
50 to 64
55 to 70
55 to 71