Carbon Brush its role is mainly on the metal friction at the same time conduction, it is not like metal metal friction when the same; metal friction on the metal when the friction, the friction may increase, while the transfer of the place may be sintered together; Carbon brushes do not, because carbon and metal are two different elements. Its use is mostly used in the motor, the shape is a variety of, a round and so on.
The advantage of power tools carbon brush: small spark low noise long life Anti-electromagenetic interference Safe and reliable Reasonable price
