2 undercut parameters, Din 76—undercut parameters – HEIDENHAIN SW 688945-03 User Manual
Page 573
HEIDENHAIN CNC PILOT 620/640
573
9.2 Under
c
ut par
a
met
e
rs
9.2
Undercut parameters
DIN 76—undercut parameters
The CNC PILOT determines the parameters for the thread undercut
(undercut DIN 76) from the thread pitch. The undercut parameters are
in accordance with DIN 13 for metric threads.
External thread
External thread
Thread pitch
I
K
R
W
Thread pitch
I
K
R
W
0.2
0.3
0.7
0.1
30°
1.25
2
4.4
0.6
30°
0.25
0.4
0.9
0.12
30°
1.5
2.3
5.2
0.8
30°
0.3
0.5
1.05
0.16
30°
1.75
2.6
6.1
1
30°
0.35
0.6
1.2
0.16
30°
2
3
7
1
30°
0.4
0.7
1.4
0.2
30°
2.5
3.6
8.7
1.2
30°
0.45
0.7
1.6
0.2
30°
3
4.4
10.5
1.6
30°
0.5
0.8
1.75
0.2
30°
3.5
5
12
1.6
30°
0.6
1
2.1
0.4
30°
4
5.7
14
2
30°
0.7
1.1
2.45
0.4
30°
4.5
6.4
16
2
30°
0.75
1.2
2.6
0.4
30°
5
7
17.5
2.5
30°
0.8
1.3
2.8
0.4
30°
5.5
7.7
19
3.2
30°
1
1.6
3.5
0.6
30°
6
8.3
21
3.2
30°
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