The characteristics of carbon brushes for power tools mainly include bulk density, resistivity, Rockwell hardness, etc
Bulk density: Bulk density is an indicator of the composition of the brush, and different requirements of carbon brushes have different requirements for this indexTherefore, the demand for brushes needs to be tested for a long time to adapt to the use of motors
Resistivity: Directly affects the conductivity of brushes, and generally the irritability is between 30% and 60%. The level of resistivity is directly related to the conductivity of the brush
Rockwell hardness: Rockwell hardness refers to a value that is read by a Rockwell hardness tester at a specific pressure to indicate the hardness of the carbon brushThe hardness is directly related to the wear resistance of the brush, too high hardness may bring wear to the motor, and when the hardness is low, the brush is easy to be damagedTherefore, for different motors, carbon brushes of different hardness are needed to adapt
