KiraraLyoko Posted September 25, 2018 Report Share Posted September 25, 2018 I've been using my Chicago brand rotary tool for a project requiring sanding. After a while there started to be a grinding noise from the motor. Like something gritty was in the motor. I assumed it was a build up of saw dust in the casing around the motor so I would blow the dust out and the noise would stop. I thought the problem was solved. Eventually it got to a point where blowing the vents out didn't help. I was worried I'd burn out the motor if I didn't fix it. I unplugged it (safety first!) and opened the casing. As I suspected there was some build up inside the tool. I proceeded to blow it out as well as I could. Once back together I turned it on. The grinding noise is gone but the motor's general sound it makes has changed. It's higher pitched then before. Not really a whine but definitely different then it was before. I'm not sure what I did wrong. Nothing was moved when I had it opened. The best help I could find online said that it may need oiled, but it sounded normal before I opened it (besides the grinding noise). Does anyone know what it might be? Quote Link to comment Share on other sites More sharing options...
KiraraLyoko Posted September 25, 2018 Author Report Share Posted September 25, 2018 I think I may have figured it out. I loosened the screws on the tool a little bit and it changed the noise. I think I just tightened the casing to much. Can anyone confirm that this may have caused the problem? Quote Link to comment Share on other sites More sharing options...
ChrisK Posted September 25, 2018 Report Share Posted September 25, 2018 First off welcome to the forums dude. I don’t have that tool so really cannot comment but maybe the brushes are going bad on the tool. That would definitely cause a change in tone and power. Quote Link to comment Share on other sites More sharing options...
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