Strain wave gear with timing belt
thingiverse
Just a proof of concept that I said I'd make available for others - no guarantee that the details below are correct or the design will work for you. Here's the original and a guide to assembly: https://youtu.be/AzreNQiTvQE You'll need an M8 bolt at least 40mm long, four M8 washers, and an M8 nut. Two 608 "skateboard" bearings are used in the center of the gear. You'll also need a pair of 13mm OD and 4mm ID bearings for the wave generator and two M4x12mm screws - preferably Pozi head to keep the head as low profile as possible - normal socket head M4 will interfere. Finally, you'll need an HTD 3mm pitch, 270mm long continuous (closed loop) timing belt.
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