Carbon brushes

See also: details on the subject carbon brushes

The service life of the carbon brushes will be influenced by many factors, such as load alternation (also idle speed), vibration, dust, humidity and chemical influences.

As carbon brushes have to be considered as wearing parts, a first control check after an adequate time of about 500 operating hours is necessary. The level of observed abrasion gives you the basis for the maintenance intervals to be defined.

When the indicated level of remaining carbon length is reached, the carbon brushes have to be exchanged with new ones of the same material.

Within one set of brushes only carbon brushes of the same material may be used.

The position of the brush rocker (marking of the neutral zone) needs attention and may not be changed. If the motor is running with an incorrect adjusted brush rocker, brush arcing and increased carbon brush wear-out will occur.

At the surface area of the collector patina is generated. The patina serves as sliding coating between the collector and the carbon brushes. In order not to destroy this sliding coating, the collector- and the carbon brush contact surface should not be touched with fingers, neither be contacted with fats nor mechanically damaged. If the patina gets damaged the consequence will be an increased abrasion of the carbon brushes.