Turning & the Lathe

In straight turning the tool is fed  parallel to the axis of the work to  reduce its diameter so that the final  diameter is the same at each end  removing a significant amount of  material in one pass is called rough  turning .

The final lighter cut that  creates a smooth surface finish is  called finish turning taper turning  produces a taper along the axis of the  workpiece tapers are produced by  offsetting the tailstock from centre  line or by using a taper attachment  short steep tapers can be turned using a  compound rest contour turning or  profiling was formerly performed by  having the single point cutting tool  trace a template of the desired profile  shape.

This has largely been replaced by  CNC turning in which the desired contour  is simply programmed into the machine  which directs a cutting tool to cut the  contour forming is another alternative  for generating complicated shapes the  tool having the desired form or geometry  is advanced perpendicular to the axis of  rotation reproducing...

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