(JMartin957)

With the feed going the same way as the pressure from the cut, the tool may
tend to jump ahead a bit. Better to have the feed forcing the tool into the
cut.

And if you have loose gibs, loose carriage, there's even more bounce of the
tool bit out of the cut--the tool bit is forced to the center of the bore--is
what you are saying, if I read you right?

Frank Morrison



Not to the center of the bore, but toward the headstock. You want the cutting
force to be acting against the feed, not with it. Otherwise, the feed may not
be steady.

The same thing, really, as climb milling. OK if you have good leadscrews and
tight gibs, but pretty jumpy if you don't. With threading, the jumps wil give
you a wobbly thread.

John Martin