Simple Planetary Gears

thingiverse

A collection of planet gears and arms to secure the planetary components in place is included. The design is based on OpenSCAD code from thing:7390, which has been modified for simplicity. The gear ratios are intriguing and may not be immediately intuitive; they depend on the stationary part used. With a fixed annulus or sun, the ratio is 1:6, while with a fixed planet carrier, it's 1:5. To use this mechanism, print it out and assemble the components accordingly.