The rotor of the angle grinder cannot be prevented from being damaged during use. So what is the reason for the damage of the angle grinder rotor? And how to repair it? Next, this article will introduce the repair methods and damage causes of the angle grinder rotor.

Reasons for damage to the rotor of the angle grinder:

1. The carbon brush will become shorter after the trial, and the pressure is not good; the replacement carbon brush does not meet the standard and jumps in the brush groove; the replacement of the carbon brush with the same standard should also be polished to match the shape of the commutator. The above can cause sparks at the carbon brushes to further deteriorate the commutation. The temperature rise of the rotor is aggravated, and finally the insulation breakdown is formed, and the rotor is damaged.

2. Overload trial will cause the rotor current to be too large and the rotor will be burned.

3. Try it directly after the thing is wet, and the leakage will break down.

4. The bearing is damaged and a sweep is formed.

5. The bearing is not smooth and generates heat.

6. The problem of use and maintenance. After sanding the metal, clean up the metal powder on and in the thing.

7. There is also a short circuit in the stator. If there is more dust, it is easy to jam the electric brush and cause poor touch, which is manifested as large sparks on one side.

Repair method:

1. Remove the brush to determine whether the stator, the brush holder and the internal wire have leakage.

2. Disconnect the connecting wire between the stator and the brush holder to judge whether the brush holder is leaking.

3. Independently measure whether the rotor has leakage.

The leakage of the rotor and brush holder can only be replaced, and the stator can be rewound or replaced.

First, disassemble it to check whether the wiring cover is damaged. The price of the coating thickness gauge can be detected by a multimeter on the casing, and then the rotor is taken out and measured again. It can be detected whether the rotor leakage or the stator leakage. The rotor leakage can only be replaced. Check if there is too much carbon brush powder and other debris accumulated in the stator, and then clean it up and measure it. If there is still leakage, it means that the insulation of the stator winding is not good. Check whether the winding is connected to the shell or is caused by moisture. , if not, you can only rewind.

Troubleshooting and troubleshooting of angle grinder:

1. The angle grinder uses a series motor, which is characterized by two carbon brushes and a commutator on the rotor.

2. The most commonly burned parts of this motor are the commutator and the rotor winding ends.

3. If the commutator is burnt, generally the pressure of the carbon brush is not good. When the motor is working, if the current continues to be large, the carbon brushes will wear out quickly. After a long time, the carbon brushes will become shorter, the pressure will become smaller, and the touch resistance will be very large. At this time, the surface of the commutator will heat up very seriously.

4. If the winding part is burnt, it means that the angle grinder puts a lot of pressure on the workpiece during operation, the friction force is large, and the motor is in an overload state for too long. That is because the current is too high.