Worm Gear Design Calculator

Calculate worm gear output torque, efficiency, and self-locking characteristics.

The pitch diameter of the worm shaft, typically 25-150 mm.
mm
Number of teeth on the worm gear wheel. Common range: 20-80.
Speed reduction ratio (e.g., 20 means 20:1). Equals gear teeth / worm starts.
Torque applied to the worm shaft from the motor.
Nm
Coefficient of friction between worm and gear. Typical: 0.02-0.05 lubricated.

Results

Gear Pitch Diameter-mm
Output Torque-Nm
Efficiency-%
Self-Locking-
Tangential Force on Gear-N
References: Shigley's Mechanical Engineering Design, AGMA 6034 — Worm Gearing Practice.