A lathe is a machine tool used to shape components whose cross-sections are circular,
but whose diameter usually varies along their length. Typically, the workpiece
is held in a stock or lathe bed, and supported and rotated by components
at each end, the headstock and tailstock.
Cutting tools are introduced from the side to shape the part. In a screw-cutting
lathe, the tool is moved along the piece to produce a thread of given depth
and pitch. Modern lathes may hold several workpieces and use several cutting
|Layout of a typical manually operated