The better planetary gearbox brands are:
WITTRNSTEIN in Germany, Rexroth in Italy, Siemens Siemens, SEW, BOSCH Bosch, Mitsubishi, Sumitomo, Kobe Steel in Japan, Parker Hannifin in the United States, ROCKWELL Lawson, Alcatel in France, Iveco in the United Kingdom, Samsung in South Korea, Hyundai, etc.
The planetary gearbox is composed of multiple planetary gears, which can be used to achieve power distribution, and the clutch is used to turn on or off some planetary gears, thereby changing the output speed and torque of the gearbox, with multiple gears, but there are large noises, low efficiency, transmission ratio is not very large during the working process, and the gear meshing gap is large and will lead to gear clearance noise and other problems.