Feed per Revolution Calculator

CORE CNC

Feed per revolution converts spindle RPM and a chosen feed-per-rev value into the linear feed rate (IPM) used for turning, drilling, and reaming operations.

Feed Rate—
Feed Rate (IPM) = RPM × Feed per Revolution. Used for turning, drilling, and reaming where feed is specified per spindle revolution rather than per tooth.

How it works

Unlike milling, where feed is programmed per tooth across multiple flutes, single-point turning tools and most drills and reamers are programmed per spindle revolution. This ties the feed rate directly to how far the tool advances each time the spindle turns once, regardless of the tool’s cutting-edge count. A quick way to sanity-check the result: feed rate in IPM divided by RPM should always equal back the feed-per-revolution value you started with.

FAQ

Is feed per revolution the same as chip load? Not quite. Chip load usually refers to feed per tooth on multi-flute milling tools, while feed per revolution is the equivalent concept for single-edge or per-revolution-fed operations like turning and drilling.

Related Guides

CNC Calculators · Turning Feed Calculator · Drill Feed Calculator

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