It's possible the bearing just isn't adjusted right. Most people are too timid to put a little preload on the spindle nut. Unless the bearings are pitted or scored, it should be possible to tighten the nut snug, like 10-15 ft/lbs, and then back off until a cotter pin hole in the spindle lines up with one of the castellations in the nut. If the spindle isn't bent or deeply scored where the bearings run, don't worry about its appearance between the bearings- - - - -all of them I've ever seen have had a very rough finish.
Jerry
