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ASA Tool Signature - III

A job of the ...

Question

A job of the shape shown in the figure below is to be machined on a lathe. The tool best suited for machining of this job must have

A

Positive side rake angle

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B

Positive back rake angle

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C

Positive cutting edge inclination angle

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D

Negative cutting edge inclination angle

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Solution

The correct option is A Positive side rake angle
It's the case of intermittent cutting.
High induced vibrations and shock $\to$ positive $α$ , (reduces shock during intermittent cutting).

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