1. Carbon brushes are shortened
When the carbon brush of a power tool is shortened to a certain extent, it will cause the electrical energy to not pass smoothly, which will affect its normal operation. At this time, we can check whether the length of the carbon brush is normal by opening the housing of the power tool, if the length is too short, it is time to replace the carbon brush.
Second, the carbon brush is seriously worn
Using power tools for a long time will cause serious wear and tear of the carbon brushes, and severe wear and tear will cause the carbon brushes to be over-smoothed or even dropped, resulting in a short circuit of the power tools and not working. Therefore, we need to check the wear and tear of the carbon brushes frequently and replace the damaged carbon brushes in time.
3. There are obvious cracks on the surface of the carbon brush
If there are cracks or dents on the surface of the carbon brushes of power tools, then it means that its life has been reached. In this case, we need to replace the carbon brushes of the power tool so as not to affect the service life of the power tool.
Fourth, the end face of the carbon brush is worn and deviated
If the carbon brush end face of the power tool is worn and deviated, then it will seriously affect the use of the power tool. This is because it will make the part of the electric energy flowing through the carbon brush abnormal, affecting the transmission of electrical energy. Therefore, we need to check the wear and tear of the carbon brush end face frequently, and once we find a problem, we need to replace the carbon brush with a new one.
