"Jim Wilkins" wrote in message
...
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

Why not lap? All of the old-time lapping methods contain the grit pretty
well. And you can cover the ways with aluminum foiled or oiled newspaper if
you're edgy about it.

If you're hand-lapping, it doesn't get in the way of anything.

--
Ed Huntress