The choice of carbon brush material

First, the introduction of carbon brush material
Carbon brushes are usually composed of carbon wool and metal clamping parts, carbon hair is an important part of carbon brushes, which directly affects the service life and efficiency of carbon brushes. At present, the common carbon brush materials on the market are tungsten carbide, pure carbon, copper, silver, etc.
1. Tungsten carbide
Tungsten carbide is one of the common materials of carbon brushes, which has the advantages of high hardness and good wear resistance, and is suitable for occasions with harsh working environment and frequent friction. However, due to its high hardness, the frictional heat generated by friction with metal is easy to cause it to sinter, resulting in short circuit and burnout of carbon brushes. At the same time, the price of tungsten carbide is also relatively high.
2. Pure carbon
Pure carbon is one of the mainstream materials of carbon brushes, due to its low density, low volatility, good conductivity and other characteristics, so that it has good friction and conductivity, suitable for equipment with high-speed rotation. In addition, pure carbon also has the advantages of good wear resistance and high temperature resistance, and is widely used in various industries.
3. Copper
Copper is a common carbon brush material, which has the advantages of excellent conductivity and good machinability, and is suitable for equipment with large load currents. Copper has excellent conductivity and resistivity, which makes it perform well in occasions where stable current is required, but copper produces more wear dust, which can easily affect the service life of the equipment.
4. Silver
Silver material is a high-end material for carbon brushes, which is widely used in high-speed machinery manufacturing, power tools, motors and generators because of its excellent electrical conductivity, strong oxidation resistance and long service life. However, its cost is high and its application is limited.
Second, the choice of carbon brush material
When choosing the material of carbon brush, it needs to be determined according to the specific use environment and requirements. For occasions that require high strength and high wear resistance, tungsten carbide material is a good choice; For conventional power tools and mechanical use, pure carbon and copper materials are more suitable; In applications that require high-speed performance and service life, high-end silver materials should be selected. At the same time, when choosing carbon brushes, it is also necessary to pay attention to whether its quality is excellent, whether the price is reasonable, and the matching with the equipment.