I'm trying to design a parametric HTD pulley for a school project, but I have been having trouble finding information on the actual profile of the teeth. Here I tried just using an arc for the tooth profile, but this produces a shape that is different than a reference pulley that I have. Does anyone know what determines the correct shape for the pulley teeth?
This is a screencap of my attempt:
And this is a picture of a reference part I downloaded from a pulley supplier.