What's up with these new rotors?

Ok, one last thing.
Say the bearing and race factory is producing a thousand bearings and races a day.
On one side of the factory machines are making races, the other side of the factory the bearings themselves are being manufactured.
At the end of the day they just take a race off one line, and a bearing off another line, and wrap them each up in plastic wrap, or just put into the box.
They never, ever, were a "machined" together set from the get go.

And i don't have a clue what you mean by "trivial honey" in reply #27.
Carry on.