In the manufacture of twist drills, the shank is joined to the body of the drill using

The final finishing process for the surface plate made of cast iron which is used as a reference surface is

The cutting tool material normally used for turning steel of very high hardness is

In a surface broaching process, a broach having $$5mm$$ pitch and cut per teeth $$0.05mm$$ is used for reducing the thickness by $$6mm.$$ If the length of the work piece is $$50mm$$ and the cutting speed is $$0.05m/s,$$ the time required / pass in seconds is