I a new extension table for my tablesaw this week, and a buddy of mine came over and talked me into going ahead and doing the arbor change out on my saw. So, we take it all apart, fence rails, extension table, wings, top, motor, and go to town.
Once you get the pulley off, the arbor itself is a shaft, two bearings on the outside, a metal collar, and a piece of spring steel to keep it all snug with lock rings on the outside to keep it together. I get the assembly out, and low and behold, the arbor assembly itself has been slipping some. There is an allen screw in the top of the cast iron assembly that tightens on to the metal collar and it wasn't tight.
After taking the old arbor off and spinning the bearings, you could hear a little noise in them, so I went ahead and put the new one in with new belts. I turned it on, and I can say it is a whole lot smoother running.
Unfortunately, now I have to finish putting it back together and lining everything back up.