Not educative but if you are pressed... :)
You have a lot of models here to load (STEP, SAT, IGES) for Moi ;) (i don't know the best format ?
https://www.mcmaster.com/timing-belts
for example this one.. https://www.mcmaster.com/6484k104 (i don't researched your exact model :)
(scroll choose format and click Save (no need to be registered)
I had loaded another thing - that is terrific! :)
Inside Moi
Rendered with the free SimLab Composer Lite

|