3. For turning of annealed alloy steel, production estimates indicate that a single pass turning operation of length 1.432 in at a depth of cut of 0.012 in on a workpiece with an initial diameter of 1.964 in, cannot take more than 2 minutes. If the lathe is operating at 1250 rpm, is this operation advisable? If not, why? And if so, what lathe horsepower is required if an allowance of 0.469 in is used?

Assuming a feed of 0.020 ipr and a 0.062 in depth of cut to machine a 2.367 in diameter bar of SAE 1020 low carbon content plain carbon steel, calculate the material removal rate in cubic inches per minute as a function of the cutting speed.