Hi Darryl,
I must admit just about every reel I've taken out has suffered shaft wear to some degree as the bearings should be a press fit and not simply slide off. This is much more of an issue on the sprocket side but it does occur on the other end as well. Why ? I still don't know, but generally most reels need to be either lightly knurled or centre popped around the bearing mounting surface. Only then can they be ground and properly mounted back into the machine.
Cheers,
M.