On Jul 13, 8:37*pm, James Waldby wrote:
On Tue, 13 Jul 2010 16:35:24 -0700, Jim Wilkins wrote:

...

I've used the watchmakers' disk method to drill locating pin holes for
the wedges for a pie chuck. The method worked well enough but it's very
difficult and tedious, involving turning three identical disks to better
than 0.001" diameter accuracy and identifying when [...] The
three spacing disks I made measure 0.5814", 0.5815", and 0.5813".

Well, if they were supposed to be identical, why'd you make
them with so much slop?

--
jiw * *

The dealer warned me not to grind or lap on the hardened-bed lathe.

jsw