A planetary gearbox, also known as an epicyclic gearing system, is a complex gear mechanism made up of outer gears called planet gears or pinions that surround a sun gear or sun wheel in the center. This complicated setup is routinely used to achieve great torque in an extremely small design. The planetary gearbox, which consists of the sun gear, planet gears, and ring gears, displays... https://kavitsu.com/what-is-a-planetary-gearbox-and-how-does-it-work.php