Module
1
Teeth
20
Teeth1
30
i ratio
1:1.5
A centre distance
21.5
A1
17.7
B
5
Tolerance (B)
H7
B1
5
Tolerance (B1)
H7
b tooth width
5
d
20
d1
30
da external diameter
21.6
da1
31.1
H
11
H1
11
L
9.5
L1
9.5
N
15
N1
16
n
5
n1
5