Second, the planet gear bearings need to play an active function in torque transfer. Planetary systems split the torque insight from the sun gear amongst the planet gears, which transfer torque to a planet carrier linked to the gearbox output. The bearings that support the planets on the carrier have to bear the entire brunt of this torque transfer.

Or, in acute cases, they could select angular contact or tapered roller bearings, both which are created to withstand axial loads.
In planetary gearboxes, however, it’s a lot more difficult to design around these axial forces for two related reasons. Initial, there is typically very little area in a planetary gearbox to Helical Gearbox include the kind of bulky bearings that may tolerate high axial forces.

The presence of axial forces makes things very different for the bearings that support helical gears. But it is important to make a distinction between fixed-axis and planetary gearboxes. In fixed-axis gearboxes, the additional axial forces total little more than a hassle. Gearbox designers will most likely upsize the bearings to support the additional forces.

Since they don’t need to withstand any axial forces, spur gear bearings perform just a supporting function in the functioning of the gearbox. The bearings should just support the rotating gear shafts, but they do not play an active part in torque transfer.

Helical Gears Place Greater Demand on Bearings