Drilling Horsepower Calculator
CustomPart.Net
Feed rate (IPM)
×
Tool diameter (in)² × (π/4)
² × (π/4)
=
Material removal rate (in³/min)
Material removal rate (in³/min)
×
Unit power (hp/in³/min)
=
Spindle horsepower (hp)
Spindle horsepower (hp)
÷
Machine efficiency (%) / 100
/ 100
=
Motor horsepower (hp)
Spindle horsepower (hp) × 63,030
× 63,030
÷
Spindle speed (RPM)
=
Spindle torque (in∙lb)
