"Karl Townsend" wrote in message
anews.com...
lately someone told me that is not possible to take very fine cuts (dust)
with those highly promoted indexable turning tools.
Anyone out there with experience?

Yea, mostly true. If you want accurate work with indexable tooling you
need to plan on your cuts to be several thou. On my 10EE with CNMG insert,
I make my last ruff cut 0.050 over. Then take a 25 thou finish pass and
measure. Then cut to size (another 25 more or less). I have no trouble
doing +/- .0005 this way.

With finely sharpened and honed HSS on the same machine, I try to keep my
cuts to .002 minimum.

YMMV, different lathes/operators get good results with different
techniques.

Karl



Well said, Karl.

We have a little Weiler toolroom lathe. Using a ccmt insert, size 21, I can
take .001 or .002 on mild steel, but I wouldn't recommentd it if finish is
important to you. On a lesser grade machine tool, I don't think it would
work as well. Someone else here posted a comment about using the high
positive aluminum cutting inserts on steel. I would have to believe that
would help. We've had great success with them in aluminum.

I'm curious why you think you need to cut "dust."