GATE 2023 PI – Question 56

Manufacturing Processes II · Machining · 2 marks · Numerical answer

In orthogonal cutting with rake angle 0°, cutting force is twice thrust force. Find coefficient of friction to one decimal.

Show answer and explanation

Correct answer: 0.5 to 0.5

Explanation

At zero rake, friction force on the rake face equals thrust force and normal force equals cutting force. Hence $\mu=F_t/F_c=1/2=\mathbf{0.5}$.

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