ToolSelector
CNC and router-bit calculators
RPM, feed rate, chip load, cutting speed, usable length, collet and material / tool compatibility.
Calculators in this category
Enter only values verified in your machine and tool documentation.
RPM calculator
From cutting speed and tool diameter.
Feed-rate calculator
From chip load, flute count and RPM.
Chip-load calculator
Calculate chip load from actual feed rate.
Cutting-speed calculator
From tool diameter and RPM.
Cutting-length check
Check that the cutting portion covers the thickness to be cut through.
Collet capacity
Compare shank diameter with the stated collet capacity.
Material / tool compatibility
Initial indicative filter for the validated CNC scope.
Important limits
These calculators provide mathematical checks and starting points. They never replace manufacturer data, mounting verification, guards or conservative testing.