TAP · CUTTING DATA
Tapping calculator
Pick a metric thread and material — synchronized tapping RPM, exact feed (n × pitch) and the correct tap drill diameter with engagement guidance.
Thread
Material
Advanced auto from material — type to override
Formulas used
n = 1000 · Vc / (π · D)Spindle speed from tapping speed and nominal thread diameter.
Vf = n · PSynchronized feed — exactly one pitch per revolution.
Øtap-drill = D − PTap drill for ~75-77% thread engagement (metric).