WOLFRAM|DEMONSTRATIONS PROJECT

Planetary Gear Train

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number of teeth:
ring gear
18
planet gear
5
Sun gear: 8
lock
ring gear
Sun gear
planet carrier
animation
This Demonstration simulates a planetary gear train with cycloidal gears. A typical planetary gear train has three components: the ring gear, the Sun gear, and the planet carrier connecting the two together.
You can see a wide range of reductions by holding stationary any one of these components and using the remaining ones as inputs and outputs.