I am not an experienced lathe programmer,
Please advise feeds and speeds for rapidly and cleanly parting off a 1" aluminum bar with a .125" generic HSS parting tool. I assume CSS?

Also how is peck parting cycle best used? I am used to manual lathe parting off which was always a tricky exercise.

Lathe max rpm 3000,
Thanks,
Joe v.

Plenty of coolant. Speed around 1200, it could be higher but I often find the tool chatters badly, feed .005ipr and do not use CSS. Go down to about .15" to .20" dia then slow the speed down to 500 or so and the feed to .001ipr so the piece does not fling of but just drops.

For peck parting I would probably take both speed and feed up a bit and make the peck retract 0.01 to save time. Still slow down close to the center and don't use peck for the final bit.

thanks Geoff,
your suggestions teed/speed worked great, only I now know that the parts catcher is not so adjustable with small diameter parts close to the chuck, see my next post.
thanks
joev