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This replacement carbon brush fits several of the most common Ametek motor models. If your existing brush is shorter than 3/16", you should consider replacing it with a new brush.
Why are carbon brushes important, and why should they be replaced? Carbon brushes work with a part called a commutator inside the vacuum motor to keep electricity running to the motor. Electricity runs from stationary wires through the brushes to the commutator and finally to the coil. The commutator and brushes are not supposed to touch, but they do occasionally rub together. Carbon is softer than the metal used to make the commutator, so the brushes wear down over time.
Compatible with the following Ametek motors:
Note: this model replaces the 33392-11 brush.