HEIDENHAIN SW 68894x-03 - Manual (Page 615)

HEIDENHAIN CNC PILOT 640 615
9.2 Under
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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°