Print-in-Place Planetary Gear Keychain - Herringbone Gear Fidget, No Supports, No Assembly - STL + 3MF

A pocket-size fidget with a real gearbox inside: spin the sun with your thumb and six planets roll round the ring. It prints in one go, flat, with no supports and nothing to assemble - and it hangs on your keys. **The gears** - Sun 13 teeth, six planets 8 teeth, ring 29 teeth, module 1.0, true involute teeth - 30 degree herringbone, so the planets cannot fall out and the gears stay in mesh - Clearance 0.33 mm sun to planets, 0.40 mm planets to ring (tip relief on the ring), measured on the fina…

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