Glossary “rotor” Definition:
1). Disc-shaped component that revolves with hub and wheel. The brake pads are forced against the rotor to provide a friction surface for the brake system, so as to slow or stop a vehicle. 2). In a conventional ignition system, the part that transfers the secondary voltage from the center terminal to the outer terminals of the distributor cap as it rotates inside the cap. 3). The rotating part of an alternator that reacts to the magnetic field to create a current flow.