2 undercut parameters, Din 76—undercut parameters – HEIDENHAIN SW 54843x-03 User Manual
Page 617
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HEIDENHAIN MANUALplus 620
617
9.2 Under
c
ut par
a
met
e
rs
9.2 Undercut parameters
DIN 76—undercut parameters
The MANUALplus 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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