Work out the real feed rate when the machine's override dial is not at 100%. Enter the programmed feed and the override percentage to see the actual mm/min and how far the chip load has moved.
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Request a Proposal →The feed rate override dial on CNC controls lets operators adjust the programmed feed in real time. This calculator converts the programmed feed and override percentage to the actual feed rate the tool sees.
Use override sparingly during prove-out to adjust for unexpected chatter or load. For production, re-program the CNC instead — override settings are often reset on power-up, leading to inconsistency between shifts.
No. Feed override only affects axis feed rate, not spindle RPM. Changing feed without RPM alters chip load — a 50% feed reduction halves chip thickness, which may cause rubbing instead of cutting.
Carbide tools tolerate ±20% feed override in most steels. Beyond 30% increase, you risk chipping; below 50% decrease, the tool rubs rather than cuts, generating excessive heat and work hardening.
Enter your programmed feed rate (mm/min) and the override percentage set on the machine control. The calculator shows the actual feed the tool experiences and the chip load change relative to the programmed value.
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Use the calculator freely. If the result points to a tooling or process problem, we can source the exact carbide tooling you need from vetted factories in China. Compare factory-direct pricing.
Before you commit to a spec, it helps to know what the market pays for it. These are real, publicly listed factory prices — not a quotation, and not a guess.
We source the tool families below direct from vetted Chinese factories, matched to the material and tolerance you just worked out. Every batch ships with its material certificate and dimensional record.
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TUNING THE OVERRIDE ON THE FLOOR? An override that works on one supplier's cutter often does not transfer, because the substrate differs. See how to tell whether two suppliers are cutting the same grade.
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