Beta: metal milling. Every number is copied as published by the tool maker and linked to its source. A machinist hasn't reviewed this section yet; rows marked ⚠ have a specific open question. Starting points only: verify against your tool's own chart.
Metal calculator
Results
RPM = 3.82 × SFM ÷ D and IPM = RPM × flutes × IPT (Harvey Tool). SFM defaults to the low end of a published range. If your spindle can't reach the RPM, the calculator caps it, keeps the published IPT and recalculates the feed, so the effective SFM drops. Diameter comes from the published row, so no values are interpolated.
Weekly "what changed" email: coming soon
We'll email you when a maker updates their feeds and speeds.