JIS4 Sun Gear Planetary Gear System Parts

The sun gear acts as a driving gear in the planetary reduction mechanism. The power on the input shaft of the gearbox is first transmitted to the sun gear, and then transmitted from the sun gear to the planetary gear, planetary gear carrier, ring gear, etc. Since the sun gear is on the high-speed, lightly loaded input side, it is less prone to damage than the heavily loaded output side components.