The electric motor carbon brush big spark, smoke is what reason
The electric motor carbon brush big spark, smoke is because the carbon brush or rotor failure, resulting in poor contact two.
Carbon brush wear seriously, and poor contact with the rotor, will spark, smoke phenomenon, and then serious motor rotation will appear weak, and even the motor can not rotate.
Hammer is a kind of safety clutch electric rotary hammer with a pneumatic hammer drilling mechanism. Hammer is the use of compressed gas piston, impact drill bit, need not make much effort, can open 6--100mm in concrete, brick, stone and other hard materials on the hole hammer in the above-mentioned materials on the opening of high efficiency, but it is not a hole in the metal.
