Gear & Pulley Calculator

Calculate gear tooth count, pitch diameter, and mesh spacing for 3D printed gears and pulleys.

Results

Visualization

How It Works

Gear module (m) = pitch diameter / tooth count. Pitch diameter = m x teeth. Center distance = (PD1 + PD2) / 2. For 3D printing, use module >= 1.5mm with a 0.4mm nozzle. Add 0.1-0.3mm backlash for smooth meshing. Print gears flat (teeth up) for best tooth accuracy.