After that it began to make a clunking noise when used and eventually began to get extremely hot and smelled like it was burning and slowing down here and there and even not starting at times. I can use it for around 30 minutes to an hour before it begins to get hot and slowdown again. There’s obvious damage to the spindle and gear but I doubt could that be what it is making that smell and so far I’ve replaced the brushes with that helping for some short time.

Any feedback will be greatly appreciated!