Small Planetary Gear Reducer is a reduction gear designed to enable direct locking to general servo motor and driven in the combination of ring gear, sun gear and planetary gear. Power is put into sun gear and planetary gear is connected to carrier to finally turn around the output shaft.

Delivering power while a few gears are revolving engaging with one another, this is able to deliver high torque and high strength under the environment. The internal structure is complicated but this is a stable system under efficient lubrication high revolution and high torque.