On Thu, 25 Oct 2007 14:21:45 GMT, "Joe" wrote:

Is there are formula or rough correlation for a starting (roughing down)
speed as it relates to the diameter of the piece being turned? What do you
use? I have a Jet 1442 (reeves) and if it means i can't safely turn a piece
on its lowest speed, I'll have to make a design change.

I know there are many factors to consider here, including balance of the
piece being turned, I'm just looking to see if my lathe's low end is in the
neighborhood.

If it's anything like my Delta gap-bed with the reeves drive, you
should be able to go plenty slow with it. (my low end is about 300
RPM)

In actuality, I've found that I prefer to rough pieces as fast as I
can, just short of a speed that will cause the lathe to walk around on
me. There *is* a reason for that- the faster the high spots are
going, the less likely your tool is to ride in to the low spots and
catch. I'm aware of the contrary arguments, of course- that's just
what works for me.

Especially when you're working with a hollow spindle between tapers, I
wouldn't get too concerned about it. You only have a max 14" swing,
and it's supported on both sides.

My opinion, of course- do what feels safe to you.