Calculate value of cutting speed, Mechanical Engineering

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a) A carbide tool with mild steel work piece was found to give life of 2hours while cutting at 50 mpm. Calculate the tool life if the same tool is used at a speed 25% higher than previous one. Also Calculate value of cutting speed if the tool is needed to have life of 3hours. Assume tailors exponent n=0.27.

b) What do you understand by tool signature?


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