Planetary gearboxes consist of three main components: the sun gear, the planet gears, and the ring gear. The number of planet gears can vary and depends on the design of the specific gearbox. Planetary gearboxes are known for their compact size, making them suitable for applications where space is limited. They can transmit a high amount of torque for their size, which is valuable in various applications. Planetary gearboxes are relatively efficient, with low friction and minimal power loss. The multiple planet gears in a planetary gearbox distribute the load evenly, resulting in reduced wear and increased durability.