Parametric Involute Gear Pair Generator – 3D Print Model

This parametric involute gear pair generator is a versatile 3D print model that produces mathematically accurate, compatible gear sets. Whether you need spur gears, helical gears, or double helical (herringbone) configurations, this OpenSCAD library lets you design functional 3D art and mechanical components with precision. Perfect for hobbyists exploring 3D print designs or engineers prototyping custom gearboxes.

The generator calculates center distances, allows backlash adjustment, and includes a ghost mode that displays simplified cylinder representations during the design phase—speeding up your workflow without excessive rendering. Each gear is built from clean involute profile formulas, ensuring smooth meshing and reliable performance.

Notable features include adjustable pressure angles, refined tooth corner calculations, and parameters for both external gears and internal ring gears. The latest version eliminates rendering artifacts and fine-tunes root clearance for even better print quality.