Well since I last posted I worked with the inner bearing that I bought, a B46. Same construction with a plastic cage around the ball bearings. Out of the box it was 3 pieces as expected. After the inner race was installed in the hub the cage and inner race did not want to seat correctly. A little "tap" and it went together. I went back to the B45 and got more agressive seperating the 3 parts. After looking at it it did seeem to be machined a little differnt, there was a small lip that prevented the bearing from separating. Deliberate or not I don't know. Seems that not allowing the cage to be removed would make packing the bearing with grease almost impossibe since it would have to be installed or removed as a unit. Oh well, in the end it seemed to work out. Thanks!
