A material-tool combination follows the Taylor tool-life relationship of:
a. If the cutting speed is increased by 20 percent, what is the percentage decrease in tool life?
b. If the exponent is decreased from 0.3 to 0.1 and the cutting speed is increased by 20 percent, what is the percentage decrease in tool life? (a. 46 percent decrease; b. 84 percent decrease)
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