As your experience "grows", you'll find .002 inch on the dia.
is more in the realm of grinding.

With lathe work, more consistent results are obtained with
a heavier cut. Suggest you use .010 on dia. as a finishing pass.

Why? You are putting more of a force on the whole setup,
which takes up the slack in bearings, etc.

It also puts the actual "point" of the cutting tool below the surface
of the material as opposed to just skating across the existing surface.

Spring passes are fine when necessary, but in most cases should try
to avoid as a common operation.


"Wayne" wrote in message
om...
Gunner wrote in message
. ..
On Wed, 28 Jul 2004 01:08:01 GMT, Anthony
wrote:


The extra material removal is from the flex in the tool/toolpost/set-up
when taking the inital cut. The information about taper when doing
this
is irrelevant and unuseful due to that fact. You would need to be able
to measure the differences in the flex of the tool tip in both
directions
in order to obtain any taper information.

Just a big of trivia..that last final pass is usually called the
"spring pass"

Gunner

Now I know the name for it. I've seen that happen on my mill/drill.
I kinda thought a much sturdier lathe taking only .002 diameter wouldn't
do that.