182 / 190
Technology
Chamfer length
Chamfer angle
Main field
Form
I
4
1)
[x pitch]
[°]
of application:
1)
The number of pitches is a simple, practice-oriented criterion for defining the chamfer length of taps
A
6 to 8
5°
short through holes
6 - 8 P
5°
B
3.5 to 5
8°
through holes in mid and
long chipping materials
3.5 - 5 P
8°
C
2 to 3
15°
blind holes and through holes
in short chipping materials
15°
2 - 3 P
D
3.5 to 5
8°
blind holes with long thread
run-out and through holes
3.5 - 5 P
8°
E
1.5 to 2
23°
blind holes with very short
thread run-out
23°
1.5 - 2 P
F
1 to 1.5
> 28°
blind holes with very short
thread run-out
28°
1 - 1.5 P
I
4
Chamfer Types
8.2