What is the approximate% change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, , is changed from 10 to 7 deg?

What is the approximate% change in the life, f, of the tool with zero

1.	What is the approximate% change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, , is changed from 10 to 7 deg?
A.	30% increase
B.	30% decrease
C.	70% increase
D.	70% decrease
Answer» C. 70% increase

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What is the approximate% change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, , is changed from 10 to 7 deg?

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