A 2-in.-diameter bar, 6 in. in length, is turned on a lathe with a depth of cut of 0.100 in. a. If the recommended cutting speed is 100 ftlmin, what RPM is to be used? (191) b. If the RPM used is 200...

A 2-in.-diameter bar, 6 in. in length, is turned on a lathe with a depth of cut of 0.100 in.

a. If the recommended cutting speed is 100 ftlmin, what RPM is to be used? (191)

b. If the RPM used is 200 and the feed is 0.020 in./rev., what is the metal removal rate? (2.5 1 h3/min)

c. If the RPM is 200 and the unit horsepower is 1.8 hp/in.'/min, what are the horsepower requirements at the cutter and for the motor if the tare is 0.3 hp and the motor efficiency is 80 percent? (4.52 hp. 5.95 hp)

d. What would be the cutting time? (1.5 min)