FYI, here are some references for creating parametric HTD (usually 5mm pitch) and GT2 (usually 3mm pitch) pulley profiles in CAD. If I remember I’ll upload the Solidworks file we have for one of our parametric cluster pulleys.
I got some positive feedback, so I’m writing up a design guide for pulleys. I’ll go over designing both HTD and GT2 pulleys in this tutorial.
The Math
There is really only one equation which governs the underlying dimensions of any pulley, as written below:
PD = \frac{np}{\pi}
where PD is the pitch diameter (more on that later) of the pulley, n is the number of teeth in the pulley, and p is the pitch of the belt teeth. “Pitch” here refers to the distance between the tips of two teeth. In FR…
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