Generator Commutator End Bearing

What is a Generator Commutator End Bearing?

The generator commutator end bearing provides support and reduces friction for the rotor shaft in generator-equipped charging systems, which are typically found in early-model vehicles. As the rotor shaft rotates, it generates electrical energy by interacting with the stator windings, which produces the electrical current used to charge the vehicle's battery and power electrical systems. The commutator is located inside of the generator, and allows the generator to create DC voltage used by the battery using conductive brushes as the generator spins. The commutator switches the current direction every half-turn to generate electricity similarly to how a modern alternator would without having to convert the current back to DC. Over time, the end bearing may wear out due to continuous rotation and load. A worn commutator bearing may produce noise, reduce generator efficiency, or even seize, and should be replaced to maintain generator operation. For your next charging system repair, shop O'Reilly Auto Parts, where we carry replacement generator commutator end bearings and related parts for a complete repair.