did you try a new blade?
It's really your best choice at this point. If the saw has sloppy bearings it's not gonna be any good for much, but you will still be able to use your new blade on the next one, assuming the 1" bore is the same. All the answers in the world here are just speculation until the blade issue is ruled out, especially when it worked fine before ...unless you or someone dropped it.
And as Hammer1 said don't use an 80 tooth and expect a long life. I have an 80 on my Dewalt 12" and it's still working OK, but doesn't see a lot of daily use.
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
Last edited by woodnthings; 03-20-2013 at 07:55 AM.