Thanks, Noglider. I have a collection of Normandy hubs. I have picked up a lot of Schwinn's. I also worked in a Schwinn dealership during the same time frame, however, we didn't see that many problems with these hubs. Most of our customers were recreational or occasional riders. We did lots of brake and derailleur adjustments, but not much repacking of bearings. A tune-up would include adjusting the cones, if needed, but not repacking the bearings with grease. If the hub was bad, we would often sell the customer a new wheel rather than rebuild it.
So, our experiences are different, and that is the value of this forum.