Tim Wescott wrote:
RB wrote:
(a bunch of off-topic, probably skewed, political crap)

Thank you for your illuminating post.

Now, I'm trying to turn some fins into a replacement cylinder for a Cox
15. I basically made myself a narrow little cutoff tool, which started
by chattering a little bit, then rapidly evolved to chattering a lot,
then bound up, wrenching the cylinder blank out of the chuck and
breaking the tool.

Since this is a _metalworking_ group, do you have any suggestions about
how I may do thing _metalworking_ task?

I suggest side-relief on your cutting tool.
Extra sharp, try different nose relief angles.

Is the root of the cut radiused or at right angles?
If you are OK with a slight radius, it will probably cut better and be
stronger too.