Well, I did it!! I set the spindle speed at 30 rpm, with a feed of 0.0092 per rev, lots of cutting oil, and it worked--part parted off smoothly with no jam-ups. Of course, I almost wet my pants while the machine was doing its thing-----! Many thanks for all the good advice. I don't know what I would do without youse guys!! Al Messer 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.