Siemens SINUMERIK 840D Programming Manual page 249

03.96
4
Further notes
Difference between a longitudinal thread and a
face thread
The cycle automatically calculates whether a
longitudinal or face thread is to be machined. This
depends on the angle of the taper on which the
thread is to be machined. If the taper angle is ≤45
degrees, a thread is machined along the longitudinal
axis, otherwise a face thread is machined.
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SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
4.7 Thread cutting – CYCLE97
X
Angle < 45°
Longitudinal thread
Turning Cycles
4
X
Angle > 45°
Z Z
Transverse thread
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