A parametric involute-gear workshop, running entirely in your browser. Dial in a real gear — true involute flanks, standard 20° pressure angle — watch it in 3D, read the engineering numbers, and take the watertight STL straight to your printer. Nothing is uploaded anywhere: the math, the render, the STL are all local.
True involute flanks (20° pressure angle). Gears mesh in pairs at the same module — the engine is validated against independent math before shipping. z < 17 is printable but a real cutter would undercut it; z < ~42 roots sit below the base circle (radial run-out applied, standard practice).