Multiple choice

Friction at the tool-chip interface can be reduced by

  1. decreasing the rake angle

  2. increasing the depth of cut

  3. decreasing the cutting speed

  4. increasing the cutting speed
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The cutting forces decrease with an increase in cutting speed, but it is substantially smaller than the increase in speed. With the increase in speed, friction decreases at the tool chip interface. The thickness of chip reduces by increasing the speed.

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