Cutting tool angle plays a vital role in surface
finish and also to get most desirable finish. We should
match the centre of work piece with respect to Tool to
make concentric. As far as matching of centre concerned,
we should have correct data/datum that for what variation,
the centre alignment shall be done. Hence how much tool
angles should change as per defined in idle condition that
also to be considered. Tool wear in hard turning not only
modifies the cutting edge geometry but also increase
cutting force and cutting temperature significantly, which,
in turn, influence the residual stress profile in the machine
surface. Therefore, wears in cutting edge is crucial during
hard turning and temperature is one of the major factor
which influences flank wear