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.