For anyone into 3D printing—whether you're building a robot, a clock, or a filament winder—gears are everywhere. But designing a working gear from scratch in CAD can be surprisingly tricky. The involute curves, pressure angles, and backlash tolerances require precise math.

Next time you need a gear, don't reach for the involute curve equation. Reach for a generator, export STL, and hit print. Happy printing – and may your teeth always mesh.

Enter the : online tools and software that automatically create 3D-printable gear files in seconds. What is an STL Gear Generator? An STL gear generator is a parametric design tool that outputs a standard .stl file ready for slicing. You input basic parameters (number of teeth, module/diametral pitch, bore size, etc.), and the generator instantly creates a watertight 3D mesh.