HEIDENHAIN CNC Pilot 4290 User Manual
Page 438
11 Tables and overviews
426
11
.1 Under
cut and
Thr
ead P
a
ra
met
ers
11.1 Undercut and Thread
Parameters
11.1.1 Undercut DIN 76, Parameters
TURN PLUS determines the parameters for the
thread undercut (undercut DIN 76) from the thread
pitch.
Where:
Thr.pitch = thread pitch
I = depth of undercut (radius)
K = width of undercut
R = undercut radius
W =
undercut angle
The undercut parameters are in accordance with DIN
13 for metric threads.
External thread
Thr.pitch
I
K
R
W
0.2
0.3
0.7
0.1
30°
0.25
0,4
0.9
0,12
30°
0.3
0.5
1.05
0.16
30°
0.35
0.6
1.2
0.16
30°
0,4
0.7
1.4
0.2
30°
0.45
0.7
1.6
0.2
30°
0.5
0.8
1.75
0.2
30°
0.6
1
2.1
0,4
30°
0.7
1.1
2.45
0,4
30°
0.75
1.2
2.6
0,4
30°
0.8
1.3
2.8
0,4
30°
1
1.6
3.5
0.6
30°
1.25
2
4.4
0.6
30°
1.5
2.3
5.2
0.8
30°
1.75
2.6
6.1
1
30°
2
3
7
1
30°
2.5
3.6
8.7
1.2
30°
3
4.4
10.5
1.6
30°
3.5
5
12
1.6
30°
4
5.7
14
2
30°
4.5
6.4
16
2
30°
5
7
17.5
2.5
30°
55
7.7
19
3.2
30°
6
8.3
21
3.2
30°
Internal thread
Thr.pitch
I
K
R
W
0.2
0.1
1.2
0.1
30°
0.25
0.1
1.4
0,12
30°
0.3
0.1
1.6
0.16
30°
0.35
0.2
1.9
0.16
30°
0,4
0.2
2.2
0.2
30°
0.45
0.2
2.4
0.2
30°
0.5
0.3
2.7
0.2
30°
0.6
0.3
3.3
0,4
30°
0.7
0.3
3.8
0,4
30°
0.75
0.3
4
0,4
30°
0.8
0.3
4.2
0,4
30°