<P> Cutting tool materials must be harder than the material which is to be cut , and the tool must be able to withstand the heat generated in the metal - cutting process . Also , the tool must have a specific geometry , with clearance angles designed so that the cutting edge can contact the workpiece without the rest of the tool dragging on the workpiece surface . The angle of the cutting face is also important , as is the flute width , number of flutes or teeth , and margin size . In order to have a long working life , all of the above must be optimized , plus the speeds and feeds at which the tool is run . </P>
what is the material of cutting tool used in lathe machine
must be harder than the material which is to be cut