HEIDENHAIN CNC Pilot 4290 - 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°