"Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote in message
. 4.170...
"Phil Kangas" fired
this volley in news:ml6ued
:

Perhaps by using, OMG, trigonometry?
Or plane geometry? horror of horrors...
But it may not be accurate to a 0.001 ....

Phil, all these are methods that might be
employed, but all depart from
the simplicity of either purchasing a large
assortment of v-anvil mics,
or just using the lathe/dro as I did.

And to be clear, the v-anvil micrometers would
be almost as troublesome
to use as the lathe, in the case of cutters like
wing drills, where you'd
have to rotate the cutter in the anvil, and get
a "feel" for when it was
properly seated at the 120-degree points.

Like I wrote before, I was hoping there was some
old 'lore' about a Q&D
method of doing this -- but I couldn't find it
in the literature, and
nobody's come up with a better way than what
we're using, yet.

LLoyd

I would not do it wws's way either. I made a setup
for my little
surface grinder to resharpen slitting saws 1/8 x 3
and mounted
a dial indicator to it to measure run-out only as
I'm not concerned
about the diameter, just consistant O.D. Spiral
flute edges are
the most challenging to sharpen. So we are doing
basically the
same thing, eih? ;)}