There was a time, not long ago, when building anything with gears meant one of two things: scavenging old printers for plastic wheels that never quite fit, or learning a thousand-dollar CAD program just to make a single 3D-printable part.
He typed: 32 teeth. Module: 1. Pressure angle: 20°. Bore: 5mm. Helix angle: 15°.
He clicked “Generate.”
The site looked like it hadn’t been updated since the early 2000s. Beige background. Comic Sans headers. A single JavaScript slider for “Number of Teeth” that went from 6 to 200. There was no 3D preview—just a flat, black-and-white SVG wireframe that regenerated every time you twitched the mouse.
