Planetary gearboxes have many advantages and disadvantages. These gearboxes have complex modeling and manufacturing, making them more expansive than other types of gearboxes.
The planetary gearbox requires very precise construction. If one planet gear is closer to the sun gear than others, it can lead to the imbalance of the planet gear, which can lead to increased wear and failure. Furthermore, the compact size of the planetary gear ensures a high level of heat dissipation, which may require cooling in applications that operate very quickly or have continuous power.