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Tapping feed and pitch calculator
This is a feed relationship, not a rigid-tapping program generator. Match your control’s feed mode and the tool thread. For an inch thread, convert TPI to pitch using 25.4 / TPI millimetres. Most ordinary taps are single start.
Formula and inputs
Lead = pitch × starts; synchronous feed = RPM × lead.
Worked example
A single-start 1.5 mm pitch tap at 500 RPM needs 750 mm/min synchronous feed.
Use the result in your setup
Confirm the input dimensions and unit system against your drawing before calculating. Keep full precision during a calculation and round only the final value to suit the measurement or programming requirement. A numerical result does not account for a machine’s complete setup, workholding or control configuration.