Ok, So the bearings are the full 7 mm wide as I would have expected. Both eyes are a few thou under the 14 mm so it seems likely that at some time someone has thinned them down. I think that when you put them together you will find that the two bearings are just a few thou over the width of the eyes but only by thous.. When they are together let us have another photograph to show the gap at each side. If it is as small as think it will be then the system should work but what I do when I assemble them for people is to put some thick grease at each end to stop water getting into the bearing outer races, The ball races themselves are sealed and lubricated for life so the only reason for this extra grease is to stop any future corrosion. I thnk that you will have a gap of about 25 thou at each end with no shims being used. Norman