NC,
Once again......a lot of good information in your post. I had no idea that Bridgeport matched the bearings as you state. From a design stand-point, if a system requires a certain precision of alignment or flatness, it would be so stated on the assembly / manufacturing drawing. In this case, I would think a higher class bearing or level of machining would be required. Then again, if you neglect the design standpoint (the Design Engineer's view) and consider the cost standpoint (the bean-counter's view), I can see where measuring and grouping bearings by critical features could occur to save a few pennies. Personally, I am happy to see such experienced individuals as yourself surfing this forum. Your feedback is a big part of making this forum fun to read; even if you do tend to scare the new members <chuckling> |