Originally Posted by
nate14
Wow, no kidding? That's pretty surprising actually. What was the regular machine shop making? Do you remember what the actual tolerance was?
Back when I learned to run a lathe and milling machine
+.001 was pretty typical. Nowadays for manufacturing, I believe it's typically less than 1/4 of that.
Originally Posted by LowCel
I still don't understand why such an expensive hub needs to be tightened a couple of rides after buying it. I've never needed to tighten one of my cheaper hubs until many, many rides were put on them.
Machining tolerances are probably
so close that it's more like a press-fit; things don't completely seat right away and might need some lateral pressures to do that. Hence the retightening. Less-close-toleranced parts will slide together easliy but slop will cause premature wear.