Dennis, I use the same "grind" on tools I use for Copper that I would use on Steel---with lots of lubricant. Al Messer --- Dennis Rayner <dennis.rayner@xxxxxxxxxxxx> wrote: > Hi all, > > I'm cutting 5+" and 7+" circles out of the front > and back smokebox > plates for my Elidir. I'm using my Dore Westbury > with a boring head at > lowest geared speed believed to be about 34 rpm. > > A simple question - what top rake should the > cutting edge (a miniature > "parting" tool) be? Currently I'm using zero (as per > brass) and it don't > seem happy! > > Thanks as ever > > Dennis > > MODEL ENGINEERING DISCUSSION LIST. > > To UNSUBSCRIBE from this list, send a blank email > to, > modeleng-request@xxxxxxxxxxxxx with the word > "unsubscribe" in the subject line. > _______________________________ Do you Yahoo!? Win 1 of 4,000 free domain names from Yahoo! Enter now. http://promotions.yahoo.com/goldrush MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.