On Wed, 02 Dec 2009 16:52:28 -0600, the infamous -MIKE-
scrawled the following:

Ed Bennett wrote:
On Dec 1, 6:40 pm, -MIKE- wrote:
Ed Bennett wrote:
Not much different from the goofy idea of
holding a square up against a drill bit.
How is that goofy?

When you do this, you assume that the drill bit is straight and not
ground with a taper. You also assume that the drill chuck and/or the
spindle have no runout (i.e. are not bent). You also assume that you
can reliably site a tiny gap between the square and an object that has
no flat gauging surface. The drill bit has flutes, cutting edges with
relief angles, etc. Things can be done to mitigate these sources of
error but using a dial indicator will always be a superior method.


None of my bits are tapered.

"None is." said the English teacher. "none = not one"


This is a woodworking group. Not a NASA machinists' group.
I don't have nano settings on any tool I use.

How does that go: Measure with a micrometer, mark with chalk, and cut
with an axe.

I plonked Ed about 8 years ago after all I saw were were ads for his
expensive indicator-on-a-stick thingie. shrug

--
Follow the path of the unsafe, independent thinker. Expose your ideas
to the dangers of controversy. Speak your mind and fear less the label
of 'crackpot' than the stigma of conformity. And on issues that seem
important to you, stand up and be counted at any cost.
-- Thomas J. Watson