1.

. Crater wear leads to(a) increase in cutting temperature(c) friction and cutting forces(b) weakening of tool(d) all of these

Answer»

​Crater wear is localized to the rake side of the insert. It is due to a chemical reaction between the workpiece material and the cutting tool and is amplified by cutting speed. Excessive crater wear weakens the cutting edge and may lead to fracture.

The answer is option D

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