Planetary Gear Fidget - Print in Place, Herringbone
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Print-in-place planetary gear fidget. Herringbone teeth lock all 5 gears in, so it comes off the bed ready to spin.
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Model information
- Source
- Printables
- Category
- Other Toys & Games
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
A satisfying, smooth-rolling gear fidget that prints fully assembled. Put a finger in the sun gear, hold the ring, and the three planets orbit around it. The herringbone (double-helical) teeth lock every gear in place top and bottom, so nothing falls out, and there is no carrier or pin to break.
Features
True involute gearing: module 1.5, 20 degree pressure angle, 30 degree herringbone, sun 19T / planets 11T / ring 41T
0.45 mm minimum clearance between every moving part, checked at 3 rotation positions with no collisions
A 0.3 mm elephant-foot relief on the first layer of every gear so the parts don't fuse to each other
Scalloped grip ring with chamfered edges, and a 10 mm finger hole through the sun
76 mm across, 12 mm thick, 5 separate bodies in one file
Print settings
PLA (PLA+ or silk PLA work great), 0.2 mm or 0.16 mm layers, 2-3 walls, 15% infill
No supports, no brim. Keep your first layer calibrated and not over-squished. If parts are stuck, set elephant-foot compensation to about 0.15 mm
After printing, hold the ring and twist the sun firmly once or twice to break the gears free. It loosens up after a minute of play
Multicolor
The 5 gears are separate bodies. In Bambu Studio, PrusaSlicer or OrcaSlicer, use "Split to parts" and assign a filament to each part for a multicolor print like the renders.
If you print one, please post a Make with a photo. It really helps, and I read every comment. Questions or fit issues? Leave a comment and I'll take a look.
About the images
All images are computer renders made from the exact STL files in this listing, not photos of a print. Colors are shown for illustration. Real print photos will be added as Makes come in.