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

Or, in acute cases, they may select angular get in touch with or tapered roller bearings, both of which are made to Helical Gearbox withstand axial loads.
In planetary gearboxes, however, it’s a lot more difficult to create around these axial forces for two related reasons. 1st, there is typically very little space in a planetary gearbox to incorporate the type of bulky bearings that can 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 excess axial forces total little more than an inconvenience. Gearbox designers will most likely upsize the bearings to support the additional forces.

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

Helical Gears Place Higher Demand on Bearings