Siemens SINUMERIK 840D sl Function Manual page 144

W1: Tool offset
2.9 Modification of the offset data for rotatable tools
Holder angle and clearance angle
The following figure shows the holder angle and clearance angle for a rotary tool with cutting
edge position 3. The machining plane is G18 (Z/X). The cut direction is 3 (negative Z or
abscissa direction).
①
②
③
④
Figure 2-42
Cut direction
The cut direction specifies the reference direction of the holder angle. The clearance angle is
the angle measured between the inverse cut direction and the adjacent cutting edge (positive).
Holder angle and clearance angle are stored in the tool parameters $TC_DP10 or $TC_DP24.
Note
Cut direction and tool angle are relevant only in the cutting edge positions 1 - 8.
144
Holder angle
Wedge or plate angle = 180° - holder angle - clearance angle
Clearance angle
Cut direction
Angle and cut direction for a turning tool
Function Manual, 06/2019, A5E47435126B AA
Tools