A disc of 200 mm outer and 80 mm inner diameter is faced at a feed of 0.1 mm/re

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A disc of 200 mm outer and 80 mm inner diameter is faced at a feed of 0.1 mm/rev with a depth of cut of 1 mm. The facing operation is undertaken at a constant cutting speed of 90 m/min in a CNC lathe. The main (tangential) cutting force is 200 N. Neglecting the contribution of the feed force towards cutting power, the specific cutting energy in J/mm3 is

Options:

A . 0.2

B . 2

C . 200

D . 2000

Answer: Option B

-NA-

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