[What's_nitro?]

Are there spacers at either end of the shaft? Or, have either of the bearings backed out of their races? As far as whether the windings are rubbing, that would be fairly obvious as well. Take it apart again and run your finger along the inner radius of the windings to see if you can feel any of them jutting out. It is a VERY long shot, but I suppose if you got a large enough pulse of current through the stator it COULD cause the windings to expand and hit the rotor. Like I said, VERY long shot.