Carbon brushes are made from three types of materials. Carbon and graphite powder; Three is the binder. Due to the different working conditions of the motor, there are many kinds of carbon brushes and electric brushes. Different brands of carbon brush, brush, its technical performance has a big difference. Therefore, it needs to be adjusted in the formulation and process. The formula consists of:

Many raw materials are used in the manufacturing of electric brushes. They have different material structures and properties. If these raw materials with different properties are mixed in a certain proportion, the comprehensive effect is completely different from that of a single original raw material. Dry powder particle size composition, affecting its bulk density, due to the differences between the particles overlap, produce different degrees of porosity (porosity). The finer the particle, the larger the surface area and the more adhesive needed. The length - width ratio of the particles is different. The composition of coal tar and coal tar binder is very complex. Its production method, technical index and the amount of addition all directly affect the performance of the product. So far, according to the carbon brush, brush performance requirements, the use of theoretical calculation method, design product formula. Generally, it is determined by combining theoretical calculation and practical experiment. When the production process and raw material quality change, the original convenient may not be applicable, at this time should modify the process and formula, in order to achieve the original quality standards and use requirements. For the use of high reputation carbon brush, brush products, should try to maintain the stability of the formula and process.