Carbon brush is an important component of the motor, it is widely used in various, synchronous motor, crane motor collector ring, ac and dc generator, battery dc motor, various types of welding machines and so on. What should we pay attention to when we choose the carbon brush? Next the carbon brush manufacturers to teach you a few tricks.

First of all, from the appearance, when the quality of carbon brush chamfering decent, structural specifications, appropriate specifications, wire section and length meet the requirements, and no loose, off, off, damaged, lost Angle and other phenomena.

The second is the use of instruments to detect carbon brush. The brush can be tested according to the required performance by the instrument. We can use the instrument to measure the brush volume density, rockwell hardness, contact voltage drop, resistivity, current density, friction coefficient, unit pressure, allowable peripheral velocity, even the size of the metal content and so on. Then the measured data and the "brush technical performance table" by the comparison of the standard value, we know whether the brush quality is in line with the requirements.

Then from the point of use, high-quality carbon brush service life is long, and will not wear collector ring or commutator, will not let the commutator ablation, scratch, uneven, wire drawing, etc., in operation, not overheating, low noise. High-quality carbon brush also has good commutation and collection performance, small energy loss. In addition, high-quality brushes can quickly form a uniform layer on the surface of the commutator or collector ring during operation.

Then we have to pay attention to one point, is in the same motor, we want to use the same model, the same manufacturer of the brush.

Finally, for large and medium-sized motors with particular difficulty in commutation, the braided carbon brush can be selected.