Thread Milling (Cycle70) - Siemens SINUMERIK 840D Operating Manual

Parameters Description
Reference point Position of the reference point:
Single position
Machining 
position
An elongated hole is machined at the programmed position (X0, Y0, Z0).
Position pattern

Several elongated holes are machined in the programmed position pattern (e.g.
pitch circle, grid, line).
The positions refer to the reference point:
X0 Reference point X – (for single position only)
Y0 Reference point Y – (for single position only)
Z0 Reference point Z
L Elongated hole length
α0 Angle of rotation
Z1 Elongated hole depth (abs) or depth in relation to Z0 (inc)
DZ Maximum depth infeed
FZ Depth infeed rate
8.2.11

Thread milling (CYCLE70)

Function
Using a thread cutter, internal or external threads can be machined with the same pitch.
Threads can be machined as right-hand or left-hand threads and from top to bottom or vice
versa.
For metric threads (thread pitch P in mm/rev), the cycle assigns a value (calculated on the
basis of the thread pitch) to the thread depth H1 parameter. You can change this value. The
default selection must be activated via a machine data code.
The entered feedrate refers to the machining. However the feedrate of the cutter center point
is displayed. That is why a smaller value is displayed for internal threads and a larger value
is displayed for external threads than was entered.
Milling
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
Machine manufacturer
Please also refer to the machine manufacturer's instructions.
Programming technological functions (cycles)
8.2 Milling
Unit
mm
mm
mm
mm
Degrees
mm
mm
mm/min
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