Tip: If you replace the carbon brush with a new one, it is found that the carbon brush has been worn or half worn within a few minutes or hours of use, indicating that your shaft rotor is in off-normal working state, and you need to replace the shaft rotor in time.The carbon brush cuts smoothly, and the copper wire is tight and does not easy to fall off. It has high wear resistance, good reversing performance, good conductivity, heat conduction and lubrication performance, and has certain mechanical strength, which has long service life.The carbon brush is used on the commutator or slip ring of the motor as a sliding contact to lead in the current. It is clamped on the metal bracket and pressed onto the shaft by a spring.Package Content: 8pcs Motor Carbon Brushes; Total Length: 42mm/1.65 inch; Carbon Brush Size(LxWxH): 14.5x5x5mm/ 0.57x0.2x0.2 inchThe carbon brush is a important component in electric motors and various power tools, designed to maintain electrical contact between the rotating part and the stationary part of the motor.The carbon brush is cut from hard carbon material with high wear resistance. The raw material is block graphite. It is an important component of electric motors and power tools, use in angle grinders, rotary hammer drill, cut-off saw, circular saw, generator and axle machine, etc.