On Sun, 21 Feb 2010 08:31:27 +1100, "Grumpy"
wrote:




I would suggest that you calibrate it against a new bearing bore. The
accuracy that those are ground to is amazing.


It is pretty amazing what you get for your money when purchasing
bearings. But even though the vast majority of bearings will likely be
better, the bore of a bearing in this size range could be close to
..001 low and another .001 out of round. As you might expect, thin
section bearings have a wider roundness tolerance than the standard
62xx and 63xx series. So, trust, but verify. g

--
Ned Simmons