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REPCO INC 6 Eves Drive Marlton NJ 08053 Ph 8567620172 TF 8008229190 FAX 8567620184 Email salesrepcoinccom Website wwwrepcoinccom GRADE TYPE KEY CG Carbon Graphite EG Electrographitic G Graphite MG Metal Graphite Carbon brushes provide the electrical contact between the stationary and rotating parts ox17 DC machines The brushes carry the load current into the rotating parts ox17 com mutator and slip ring motors The grade ox17 the brush is usually x17ound stamped on the x17ace ox17 the carbon The grade indicates the material composition ox17 the brush It represents one ox17 the more technical challenges in carbon brush applications The correct brush grade is important x17or good commutator and ring wear maximum brush lix17e and motor perx17ormance Brush grades are usually classifed according to the manux17acturing processes and the types ox17 materials used The dix17x17erent grades in use today are derived through a varia tion ox17 raw materials molding pressures temperature duration ox17 the baking process and ax17tertreatments These elements produce varied resistivity hardness and strength that in turn ax17x17ect contact drop x17riction and commutator flming All grades x17all within the x17our major categories ox17 carbon graphite electrographitic graphite and metal graphite The major characteristics ox17 each category and a summary are listed on the opposite page There are only a x17ew major carbon block makers in the world Each ox17 these manux17ac turers can make as many as 100 dix17x17erent grades Each grade is designed to perx17orm under certain operating conditions Carex17ul consideration is given to the actual running loads the duty cycle voltage speed and the environment Repco supplies product x17rom these major carbon manux17acturers In addition there are also carbon brush x17abricators A x17abricator purchases carbon block cuts it to size adds hardware and stamps its own grade designation on the x17ace ox17 the brush Over the years this practice has greatly added to the number ox17 grades in the marketplace today Our computer crossrex17erence system allows us to identix17y OEM and ax17termarket brushes Therex17ore Repco Inc can supply carbon brushes x17or any industrial motor Each industry has unique environmental and operational challenges Our application experts can recommend the best option to meet customer requirements Itx19s important that dix17x17erent brush grades are not mixed in the same machine No mo tor manux17acturer recommends this practice GRADES 44