Tapping · Released

Tapping Parameter Assistant

Calculate rigid tapping spindle speed and synchronized feed from thread diameter, pitch, and cutting speed. Beginners can use this to set up G84 tapping cycles safely.

Nominal thread diameter (mm)

Pitch (mm/rev)

Cutting speed Vc (m/min)

Machine max RPM (0 = no limit)

Recommended RPM

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Tapping feed rate

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mm/min = pitch × RPM (rigid sync)

Tap drill size (minor Ø)

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Tapping strategy

Formula and use

RPM = 1000 × Vc ÷ (π × D)

Tapping feed (mm/min) = pitch × RPM — the machine axis must be synchronized with spindle rotation in rigid tapping mode.

Minor diameter ≈ D − pitch × 1.08256 (60° metric thread fundamental triangle).

Tapping uses much lower cutting speeds than drilling. Start at the lower end of the material range and use tapping fluid. Blind holes require chip evacuation; through holes are more forgiving.