A planetary gear reducer is a type of speed converter that utilizes gears. Its main characteristics are small size, high load capacity, and smooth operation.
The main features of a planetary gear reducer are its small size, high load capacity, and smooth operation; however, high-power, high-speed planetary gear transmissions have a more complex structure and require high manufacturing precision.
Some types of planetary gear transmissions have high efficiency, but the transmission ratio is not large.
Other types can have a very large transmission ratio, but their efficiency is lower. When used as a reducer, its efficiency decreases as the transmission ratio increases.
When used as a speed increaser, self-locking may occur.