What is rotor?

rotor pump

Glossary “rotor pump” Definition:
A positive-displacement pump that uses an inner drive rotor and an outer drive rotor to produce an oil flow. Lobes on the rotors create a fluid chamber of varying volumes and eliminate the need for a crescent as used in a gear pump.

rotor

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.