Q.59. In orthogonal turning of low carbon steel pipe with principal cutting edge angle of 90°, the main cutting force is 1000 N and the feed force is 800 N. The shear angle is 25° and orthogonal rake angle is zero. Employing Merchant’s theory, the ratio of friction force to normal force acting on the cutting tool is
(A) 1.56
(B) 1.25
(C) 0.80
(D) 0.64
Answer: (C)
Explanation:
