I wrote a CAD package in Go that has a function for it. https://github.com/deadsy/sdfx https://github.com/deadsy/sdfx func InvoluteGear( numberTeeth int,

I wrote a CAD package in Go that has a function for it. https://github.com/deadsy/sdfx https://github.com/deadsy/sdfx func InvoluteGear( numberTeeth int, // number of gear teeth gearModule float64, // pitch circle diameter / number of gear teeth pressureAngle float64, // gear pressure angle (radians) backlash float64, // backlash expressed as per-tooth distance at pitch circumference clearance float64, // additional root clearance ringWidth float64, // width of ring wall (from root circle) facets int, // number of facets for involute flank )