Planetary Gearbox Necklace

thingiverse

This necklace features a functioning miniature planetary gearbox that can be spun from a distance by pulling on the necklace string. No glue or fasteners are required; all parts fit together due to friction. Several options are available: - Planet carriers with 3 or 6 gears. - Three alternatives for printing the shell: 1.) Can be printed in two pieces as shown in the pictures, allowing it to be printed without supports and providing cleaner surfaces. 2.) Single piece variant - may be better suited for certain materials (resin, brittle filaments, or composites) or those experiencing issues with over-extrusion or elephant feet. Requires supports. 3.) Single piece variant with a sacrificial layer. Same as option two but with a sacrificial layer instead of supports. This is the recommended choice. I have corrected the issue affecting Simplify3D users who were experiencing intersecting shells in the "Top v2" part. A third shell option has been added on October 8, 2019.