Siemens SINUMERIK 840DE Programming Manual page 156

Programming Motion Commands
4.15 Thread cutting with constant lead (G33)
N10 G1 G54 X99 Z10 S500 F100 M3
N20 G33 Z-100 K4
N30 G0 X102
N40 G0 Z10
N50 G1 X99
N60 G33 Z-100 K4 SF=180
N70 G0 X110
N80 G0 Z10
N90 M30
Example of taper thread with angle less than 45°
Machining a taper thread
4-50
;Zero offset, approach
;start point, spindle on
;Cylindrical thread: end point in Z
;Retract to starting position
;2nd cut: Starting point offset 180°
;Retract tool
;End of program
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Fundamentals