Why does the electric tool micro-motor have electric sparks?

Power tool motors are typically micro gear motors made up of a reducer and a micro motor. Due to the fact that it is a brushed DC motor, electrical sparks will always happen during operation as a result of friction between the various elements, hence the spark in the motor is What led to it? I'll introduce myself below.

1. The power tool's shaft is positioned incorrectly. If the shaft of the geared motor is not in the proper position, it can be modified to reduce friction and sparks caused by the little geared motor;

2. The electrical wear and the improper specifications of the electrical accessories will also cause the friction to increase abruptly, leading to the formation of sparks;  The contact between the carbon brush and the commutator is poor;  The voltage of the gear motor is inappropriate; 

3. As a result of the geared motor's commutator's rough surface and increased friction with the brush, several sparks are produced;

4. The geared motor operates at high load for an excessive amount of time while the electric tool is continuously employed, creating an electric spark;

5. Sparks will also be produced if the small gear motor's winding or rotor are both broken.

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