Free starting RPM and feed rates for end mills in carbide, HSS, and cobalt, plus a practical tip for every job. Built for hobby and small-shop machinists.
Conservative starting values. Always verify against your machine, setup, and tool maker's data.
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Sources: starting SFM and chipload are set at the conservative end of published ranges from Harvey Tool, 6GTools and Machinery's Handbook-based charts. HSS/cobalt chiploads are derated from carbide. Always confirm with your tool maker's data and a test cut.