Module
1
Teeth
18
Teeth1
45
i ratio
1:2.5
A centre distance
33.6
A1
24
B
6
Tolerance (B)
H7
B1
12
Tolerance (B1)
H7
b tooth width
6
d
18
d1
45
da external diameter
19.9
da1
45.6
H
17
H1
18
L
15
L1
15
N
12
N1
35
n
9.9
n1
12