John,
Maybe look to be sure that you are getting
oil to that journal. Spinning a bearing that fast would sound as if it wasn't getting any
oil or very little. Do the bearings look as if they have been very hot or do they have worn places in them? Good luck and just hope that maybe you got a bad bearing, but I would have that bore and the alignment of the piston and rod checked also to be sure there is no binding.
Ron