Truncated Octahedron Planetary Gear Fidget Spinner
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Print-in-place planetary gear fidget spinner. Self-locking gears, with no extraneous bits to keep it together.
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Model information
- Source
- Printables
- Category
- Math
- License
- Creative Commons — Attribution
Printed out surprisingly well with small tolerances using my Elegoo Centauri V2. The OpenSCAD code does have 0.5mm of added slop in the outer gear, so if you're confident about your printer's horizontal dimensional accuracy, you can get it meshing even tighter.
The outer ring is slightly flexible when printed in Elegoo marble PLA, suggesting this could be used as a transfer cog for a strain-wave gearing system.
An alternative model is provided with larger teeth and much tighter tolerances, at the limit of what the Centauri V2 can achieve. I needed to adjust the resolution limits in OrcaSlicer to get it to print. The teeth were stuck on printing, and needed quite a lot of work to free them up.