Sparking around the Brushes
I have a dewalt 4" angle grinder.
It started to spark on one side of the armiture.
Do you know what has happend to this tool?
A comprehensive set of repair information regarding objects with specified tasks, usually for fixing or building.
If the sparks go all the way around the copper strips, also called the commutator, the armature has shorted. That means the insulation between the wires and the iron has broken down in the inside of the armature. Some times it can be as simple as a short between the bars, the copper strips, of the commutator.
With the tool unpluged, use an air hose with an air nozzle to blow any trash or dust from the area around the brushes and the communator.
If that does not improve the symptoms the next thing is, with the tool unpluged, remove the brushes, often a screw on cap hold them in, and inspect and compare the length. A short length will cause the springs to not put enough pressure on the carbon to make good contact with communtator. In that case, replace the brushes. Also check the freedom of movement of the brushes. If dirt jams the channel the brush slides in, the spring can't push the carbon tight to the commutator.
This repair will work on other hand-held power tools.
I bought a second hand Hitachi W 6VB2 electric drill it never had a 13 amp plug on it it came with a connector Wat you plug into a transformer so I took that off and put a 13 amp plug on it but when I turn it on it really sparks and crackles so I took it apart cleaned all the comunater and brushes seem fine but still having same problem anyone have any
The sparking around the comunater usually indicates there is a short between the windings of the armature and ground. If nothing else, check between the individual bars and ground. Also there will be a connection to another bar of the comunater.
I am curious about the transformer: What purpose did it serve? Was this a set up for 220 volts used in Europe? Or perhaps another voltage set up, as yet unknown?
If your in the UK and you took off the yellow round 3 pin plug and attached a normal 3pin plug you plug straight into the wall. Then you have taken a 110v power tool and gave it 240v.
The short and curly of it is, it will burn out and then all you'll have left is a paper weight.
In hope this helps