Your bit
search our catalogYour material
what you're cuttingYour machine & speed
sets RPM + feed limitFeed = RPM × flutes × chipload — this RPM and feed rate calculator uses published chip-load charts keyed by bit class (compression vs general-purpose), diameter and material, capped to your machine's real feed limit. Guidance only — listen to the cut and adjust. Questions? Ask our team.
Bits for every material in this calculator
The calculator above uses published chip-load figures for each of these materials. These are the tools those figures are drawn from — every one lists its own feeds and speeds on its page.
CNC router bits for hardwood & softwood
Covers: Hardwood, SoftwoodCNC router bits for plywood & MDF
Covers: Plywood, MDFCNC router bits for melamine & particleboard
Covers: ParticleboardCNC router bits for acrylic & plastics
Covers: Acrylic, Soft plasticNumbers look right but the cut does not? The Cut Doctor reads your actual RPM, feed and flute count — or a photo of the edge — and gives you the cause, the corrected numbers and the bit that fixes it. Free, no signup. Prefer to read? Why plywood tears out, why melamine chips, why acrylic melts, why the wood burns, or why aluminum welds to the bit. Not sure which bit to start from? Try the CNC Bit Finder.
