Helicals gears are a modification of spur gears. They can replace spur gears in any application. The teeth are cut following a slanted, helical path. The angled teeth engage more gradually than spur ...

The Belfry OpenScad Library, v2.0. An OpenSCAD library of shapes, masks, and manipulators to make working with OpenSCAD easier. BETA - threading.scad · BelfrySCAD/BOSL2 Wiki ...