On 12 Mar 2006 09:22:44 -0800, "
wrote:

And last but not least, you might want to turn some tapered bits of
steel similar to the things sold for sizing finger rings. I have done
this. Handy for sizing Orings, but also for measuring holes. Stick
the taper tool into the hole and then measure the diameter of the
tapered tool with a caliper flush with the surface that has the hole.
Much easier than trying to use the inside caliper measurement ears.
Good for Orings because they stay round and you measure the tapered
steel which does not distort.


Somebody (Parker?) sells a graduated cone for this. Probably
expensive.
--
Randy Replogle