Carbon brush holder suitable for HIILTTI SFC14-A SFC14A SFC22A Spark phenomenon during the use of carbon brushes Methods of analysis and response 1. It may be due to impurities in the carbon brush, the presence of hard stone chips, or its already determined quality. This situation can be resolved by replacing the carbon brush. 2. It may be caused by the protrusion of mica in the commutator, and in this case, a mica plate needs to be engraved to solve the problem. 3. If the carbon brush is not on the centerline, the position of the carbon brush can be corrected to solve the problem. 4. If the carbon brush is too short or the spring pressure is insufficient, the problem can be solved by replacing the carbon brush or spring. 5. It may be caused by oil stains or sand particles on the carbon brush or commutator, and the problem can be solved by removing the dirt. 6. It may be caused by the presence of conductive powder in the middle of the copper plate of the commutator, and the conductive powder can be removed to solve the Mofang carbon fault in the future. 7. It may be caused by rough surface of the commutator or uneven copper plates, which can be ground by grinding the commutator Cutting to solve the problem. 8. It may be caused by solder flowing into the copper plates of the commutator, and the solder between the copper plates can be removed to solve the problem. 9. It may be caused by poor contact between the carbon brush and the commutator surface, and the problem can be solved by adjusting the spring pressure, grinding the carbon brush, or replacing the carbon brush and spring. Mofang Carbon Brush