Worm Planetary Gear Mechanism Animation 

Planetary gearboxes are used extensively in the mining, railway, metalworking, automotive and robotic applications, and crane industries. Ideal for high torque transmission.
Normally, 3 planetary gears are used, but considering the strength of the gears due to the high torque value, I designed it as 4 planetary gears. In the system I designed, the worm gear system was also used.