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Electrical brushes and brush materials are used in conjunction with slip rings, commutators or other contact surfaces to maintain an electrical connection in rotary and linear sliding contact applications. Electrical brushes and brush materials require very good frictional characteristics combined with high to moderate conductivity. Graphite brush materials are used for high power equipment. Metal brushes or sliding contacts are used for signal or low power applications.

Electrical brushes and brush materials are made from copper graphite, amorphous carbon, graphite and flake graphic, electrographite, metal graphite, resin-bonded graphite, silver and silver alloys, silver graphite, and specialized or proprietary materials. A carbon brush is typically constructed of carbon with an amorphous structure or graphite, which is an allotropic form of carbon. A graphite brush is useful in high power or sliding contact applications because the graphite is a good lubricant and provides low friction contact. Electrical brushes and brush materials also include combining graphite with metals. A metal graphite brush, such as a copper brush combined with graphite, provides the low friction capability of graphite with the high conductivity of copper to provide reliable contact. A copper graphite brush is an expensive option, but has excellent flexural strength and high conductivity. A silver graphite molybdenum disulfide brush is the most common used in slip ring mechanisms used in aerospace applications, such as solar power arrays.


Products & Services Related to Electrical Brushes and Brush Materials
EDM Electrode Materials
EDM electrode materials and components consist of highly conductivity and/or arc erosion resistant materials such as graphite, copper or copper graphite.
Electrical Contact and Electrode Materials
Electrical contact and electrode materials are soft, high conductivity, oxidation resistant materials used in circuit breakers, relays, and for EDM applications.
Electrical Contacts and Contact Materials
Electrical contacts and contact materials are soft, high-conductivity, oxidation- resistant materials that are used in circuit breakers, relays, switches, and electrical discharge machining (EDM) applications.  They often have a second phase in order to provide anti-welding and/or arc resistance.

Other Topics You Might Be Interested In
Introduction The carbon brush has been a critical component in variable speed rotating equipment for over 100 years. The trend towards reduced maintenance has resulted in the elimination of many well... (Read More)
Metal graphite is a composite mixture of graphite and a metal, usually copper, which provides higher conductivity than pure graphite and lower friction or sticking than pure metal in sliding contact... (Read More)
Copper graphite is a composite mixture of graphite and copper metal (~15 to 95%), resulting in a material with higher conductivity than pure graphite and lower friction or sticking than pure copper in... (Read More)

Engineering Web: Electrical Brushes and Brush Materials
Pages: 1 - 3 of 238
Electric motor - Wikipedia, the free encyclopedia
An electric motor uses electrical energy to produce mechanical energy.
Commutator (electric) - Wikipedia, the free encyclopedia
3 Brush Construction 3.1 Brush Holders
Electric power engineering - Excessive wear of carbon brushes...
Chemical Civil/Environmental Coastal Computer Electrical Geotechnical Industrial Marine/Ocean Materials Mechanical Military Mining Nuclear Petroleum
See more product announcements for Electrical Brushes and Brush Materials
Brush Assemblies

Brush Assemblies
Fabricast, Inc.


Custom Electrical Contact and Electrode Materials:

Custom Electrical Contact and Electrode Materials:
Dexmet Corporation


Servometer® Baffled Electroforms

Servometer® Baffled Electroforms
Servometer - PMG, LLC


11 See more product announcements for Electrical Brushes and Brush Materials

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