Electric motor Armature repair, NEVER TRY THIS EVER! Electricity can and will kill you if your are not careful, if you have a bad armature, replace it, do not try to repair it, this only shows you the mechanics of an armature and this probably won’t last long. I ended up using a brass brush instead, the copper did not last long, and don’t forget to clean your graphite brushes with light sanding. I also put a heat resistant ring around both ends of the armature brushes cut out of tubing and glued them in, this worked good at holding the brush in place. Any time you experiment with motors they can hold a spark for a long time after you are done so make sure you watch your project for a while after to prevent any fire hazard. Again don’t ever do this just replace the armature with a brand new one, or better yet get a new tool. The cost for a new tool is similar to an armature cost, this is desert island science, for those people stranded on an island with nothing but spare parts. keep inventing’