A few weeks ago I had a post about a grating noise when my Ryobi CMS stopped spinning. It cut okay and didn't sound unusual when starting or running. I also checked with Ryobi. They said it was the brushes wearing out, which they do in a relatively short period.
Well, I took my good Freud blade and the laser off it and put a crappy Dewalt blade on, with the intention of dumping it on Craigslist. (yes, I was going to mention the brushes! Somebody would want it for $25.) Well, I tried it and it worked fine! I put the Freud blade and laser back on, and it still worked fine. It is healed.
What the heck is going on? The blade was on tight and it worked fine for months before the noise started; so I don't think anything was loose. And it cut alright even after the noise started.
Maybe I should get rid of it quickly...