turning

SYNTAX

G71 U.. R..
G71 P.. Q.. U.. W.. F..

Where
U    DEPTH OF CUT IN X AXIS (RADIAL)
R    RETRACTION
P    START N BLOCK NUMBER
Q    END N BLOCK NUMBER
U    FINISHING ALLOWANCE IN X AXIS
W    FINISHING ALLOWANCE IN Z AXIS
F    FEEDRATE 

A conventional engine lathe or a turret lathe is a common machine in just about every machine shop. A lathe is used for machining cylindrical or conical work, such as shafts, rings, wheels, bores, threads, etc. The most common lathe operation is removal of material from a round stock, using a turning tool for external cutting. A lathe can also be used for internal operations such as boring, as well as for grooving, threading, etc., if a proper cutting tool is used.