On Thu, 28 Feb 2008 07:21:19 -0800 (PST), John Martin
wrote:

On Feb 28, 9:59=A0am, wrote:


It sounds to me like your main problem is that you are not comfortable
with
telescoping gages. They are a little fiddley so I would suggest that
you play
around with them a bit until you get the hang.

True. You have to learn that you do not set the gauge to the bore,
but use the bore to set the gauge. You don't try to square it up in
the bore and then lock it. That will give you a false reading, as you
may or may not be square in the bore, and you may or may not be at the
largest diameter. Instead, you lightly lock it at an oversize and
gently wiggle it through the bore, allowing the bore to compress it to
the true size. Lock that size and then continue to wiggle it - there
is a lot of feel involved.

John Martin

Your absolutely correct John. I see a lot of people that don't measure
using telescoping gauges correctly. And they call them snap gauges. I
hate that!
What works for me is this, I place the T-gauge in the bore with the
large diameter pin pointed towards me and I have the gauge tilted away
from me a little. I snug up the gauge and keeping the larger pin
stationary, roll the gauge towards myself so the small pin finds the
center of the bore and the gauge collapses slightly. I tighten the
gauge a little as it rolls out of the bore towards me. I measure and
measure until I have at least 3 readings that coincide with each
other. I get very consistent readings doing it this way.
This is what works for me.