On Aug 10, 4:41 am, "Lloyd E. Sponenburgh"
wrote:
"Metalcutter" wrote in message

ups.com...
"You can't get a better finish on your part than what's ground into
your end mill."

.... heh! Where'd I hear something like THAT before ? G

He also said climb accross, conventional back. One: this gives you an
automatic finish pass.

.... yup... but there's a "yeahbut" in there. Yeah, but a lot of the cheap
machines built of grey-colored jello (and old, worn machines) have so much
flex and slop that conventional won't allow you to hold a dimension. So,
many rec. machinists end up climbing on all cuts, lest they over cut or
chatter the hell out of the surface.

Gotta have near-perfect rigidity to do it right.

LLoyd

I've always had good luck with it LLoyd.

But then my experience is fairly narrow and limited to Blue Hurcos and
an Index mill. :-)
I've never run BIG stuff.

The theory was: The climb cut would stress the tool and machine away
from the part and then when coming back on the same setting the tool
and machine would relax; and that small movement would allow for a
finish cut. Hand mill stuff.

As for CNC-ing I usually just run the same path again after the
roughing cut. That usually puts me within .001-.002 of where I want
to be.

Regards,

Stan-