Heidenhain MANUALplus 4110 User Manual Page 186

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186 4 Cycle Programming
4.6 Thread and Undercut Cycles
Examples of thread and undercut cycles
External thread and thread undercut
The machining operation is to be performed in two
steps. Thread undercut DIN 76 produces the undercut
and thread chamfer. In the second step, the thread
cycle cuts the thread.
First step
The parameters for the undercut and thread chamfer
are programmed in two superimposed input windows
(see figure at right).
Tool data
Lathe tool (for external machining)
WO = 1—Tool orientation
A = 93°—Tool angle
B = 55°—Point angle
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