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Crater wear always starts at some distance from the tool tip because at that point
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- cutting fluid does not penetrate
- chip tool interface temperature is maximum
- normal stress on rake face is maximum
- tool strength is minimum
- cutting fluid does not penetrate
Correct Option: B
Maximum temperature at the chip tool interface is 2 – 3 mm away from cutting edge because shank provides rapid heat dissipation just below the cutting edge.
