Why Are Planetary Gearboxes Widely Used in Servo Systems?

Servo systems are developed to be very precise, controllable in speed, and accurate. The gearbox that is connected to the servo motor is important to attain this performance. Planetary gearboxes are the most common type of the gearboxes used in servo systems and with reason.

What Is a Planetary Gearbox?
A planetary gearbox is made up of:

A sun gear (center)
Multiple planet gears
An outer ring gear
The planet gears spin around the sun gear evenly distributing the load. Such a design is what makes planetary gearboxes small, powerful and efficient which is exactly what is needed by servo systems.