Recommended industry standards in the JB/T4003-2001 machine brush the brush is divided into four main categories:
1. graphite brushes.
2. electrographite brushes.
3. resin bonded graphite brushes.
4. metal-graphite brush.
Brush wide range of AC and DC generators, synchronous motor, battery DC motors, slip rings for crane machines, all types of welding machines and so on. With the development of science and technology, motor type and use of increasingly diverse operating conditions, so there are different grades of brush is needed to meet these requirements, so the brush type is also more and more with the development of motor industry. For ease of use and management, the large brush is classified.