Built for practical decisions
The basic spindle-speed relationship uses cutting speed and cutter diameter. Feed rate becomes more useful when the number of teeth and chip load are known.
Important assumptions
Use the result as a planning estimate. Confirm material data, machine settings, drawing tolerances and applicable standards before production or structural work.
Quick answers about this milling speed and feed calculator
What does the milling speed and feed calculator help me decide?
Calculate a starting spindle speed and feed rate from cutter diameter, cutting speed, teeth and chip load.
Can I use the result directly for production?
Use it as a starting estimate. Verify the drawing, material grade, machine capability, tooling data and applicable standard before cutting, forming, welding or ordering material.