Module
2.5
Teeth
20
Teeth1
30
i ratio
1:1.5
A centre distance
52.1
A1
44.7
B
12
Tolerance (B)
H7
B1
18
Tolerance (B1)
H7
b tooth width
20
d
50
d1
75
da external diameter
53.9
da1
77.4
H
32
H1
31.9
L
28
L1
28
N
35
N1
50
n
9.6
n1
15