electric drills and angle grinders have large sparks, mainly caused by friction between carbon brushes and rotor copper heads. Therefore, the main cause of sparks is the exhaustion of carbon brushes or the wear of rotor copper head pieces.
You can check whether the carbon brush is used up. The carbon brush runs out to the most damage to the motor rotor copper head. Because the carbon brush is used up, the copper wire on the carbon brush directly rubs the copper head piece, causing the copper head piece to be damaged and the rotor is scrapped. Lost. When the carbon brush height is lower than the original height by 3 minutes 2, the carbon brush should be replaced. When changing time, you should change all around. Keep the carbon brush pressure consistent.
When the carbon brush needs to be replaced, it means that the machine has been used for a long time, so it is necessary to check when changing the carbon brush, including:
Clean the internal dust to avoid poor heat dissipation
Check if the bearing rotates smoothly
Whether the grease is aging
Clean copper head copper
If you do not check the above problems, after changing the carbon brush, the life of the grinder may be reduced due to poor heat dissipation or aging of the grease.
FB Fan Page
/ hksubwoofer