Module
4
Teeth
20
Teeth1
30
i ratio
1:1.5
A centre distance
82.7
A1
67.3
B
20
Tolerance (B)
H7
B1
25
Tolerance (B1)
H7
b tooth width
30
d
80
d1
120
da external diameter
88.7
da1
123.6
H
49
H1
46
L
43
L1
40
N
50
N1
60
n
17
n1
20