Carbon brush material process

Metal Graphite The main material of this type of carbon brush is electrolytic copper and graphite. According to the needs of the use of silver powder (used in precision instruments, very expensive), aluminum powder and other metals, these carbon brushes also contain binders and binders. This kind of carbon brush has both the frictional properties of graphite and the high conductivity of metal. Therefore, it is suitable for low-voltage motors with high load and commutation requirements. Its peripheral speed does not exceed 30 m/s.

Natural Graphite Natural graphite is the main raw material for this kind of carbon brush. The adhesive is made of asphalt or resin, baked or sintered at 1000 degrees. This kind of motor has good lubrication performance and current collecting performance. Most of them are used for smooth running of small and medium-sized DC motors and high-speed turbine generator collector rings.

The main components of electrochemical graphite are carbon black powder, coke, graphite, and other carbon powder materials. After being processed at a high temperature of 2500 degrees, it is converted into microcrystalline artificial graphite. Such carbon brushes have excellent commutation and self-lubricating properties, and are widely used in various types of AC and DC motors to not only have a long life but also have little wear on the commutator.