Size
Radio
A
A1
AB
B
BB
BC
CC
E1
E2
40
5:1 10:1 15:1 20:1 30:1 40:1 50:1 60:1
2.58
3.78
5.16
3.31
1.85
1.575
2.95
50
2.85
4.13
5.79
3.82
1.97
1.969
3.54
4.33
60
3.15
4.72
6.50
2.17
2.362
4.02
5.08
63
3.37
6.93
4.45
2.48
2.480
5.55
70
3.76
5.51
7.68
5.12
2.56
2.756
6.10
80
4.11
6.30
8.27
2.76
3.150
7.09
100
4.78
7.00
9.96
6.42
3.937
8.46
120
8.26
9.06
11.22
7.28
3.94
4.724
10.04
135
6.89
10.24
12.60
5.135
155
7.64
11.89
15.43
9.92
6.102
9.84
12.00
175
8.78
11.42
12.80
16.22
10.31
5.91
6.890
10.75
13.70
F
M
N
G
Z
Input Shaft
Output Shaft
U
HS
T × V
S
LS
W × Y
4.09
0.39
0.500
1.10
1/8 × 1/16
0.625
1.38
3/16 × 3/32
8.86
4.53
0.55
0.43
1.18
0.750
1.57
10.12
4.92
0.59
1.000
1/4 × 1/8
10.87
5.90
12.01
6.18
0.71
0.875
1.125
2.36
13.78
6.85
1.375
5/16 × 5/32
7.48
16.14
8.82
0.79
1.500
3/8 × 3/16
8.66
19.49
10.39
0.98
1.750
3.35
22.05
11.97
1.625
2.250
3.74
1/2 × 1/4
11.02
23.82
12.99
2.500
5/8 × 5/16
26.57
14.57
1.875
2.750