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SFM = 0.262 x D x RPM RPM = (3.82 x SFM) / D IPR = IPM / RPM or CHIP LOAD x F IPM = RPM. x IPR CHIP LOAD = IPM / (RPM x F) or IPR / F

Excessive depth of cut will result in tool deflection. As required, the depth of cut increases use the largest diameter cutter available to maintain a depth to diameter ratio of 1 : 1.

Melin is working on providing a lightweight application for machinists and programmers alike. Straightforward app for figuring speeds and feeds in Inch and Metric both. Also has calculations for Metric to Inch / Inch to Metric conversions. -