Question $2(1*3=3$ marks$)$;

A slab milling operation will take place on a part $300$ mm long and $40$ mm wide. A

helical cutter $75$ mm in diameter with $10$ teeth will be use. If the feed per tooth is

$0\mathrm{.}2$mm$//$ tooth and the cutting speed of $0\mathrm{.}75$m$/$sec$.$ Find the machining time,

estimate power and torque, and the metal removal rate for removing $6$ mm from

the surface of the part.

$($Assume specific energy as $3$ W $.$sec$/$mm$3)$