Hello all. My problem is turning a tube 35" long, .812 ID with a .077 wall thickness. I worked with the machine seller over 6 weeks to finally get it running without chatter. The machine is a brand new Daewoo 2500 dual turret. I'm using a steady rest, hydraulic and self centering. RPM is 1350 Feed is .0085 IPR and depth of cut is .060 roughing and .015 finish. The finish is pretty good but I can't get the chips to break during roughing or finish cut. I get 8 to 12 inch long chips that are like springs. I have thousands of parts to mfg. and I know it's only a matter of time before the steady rest tangles one up. I am machining these parts on a hardened arbor. When I ship a few hundred parts to my customer I'll be able to shave some time off these parts (right now 19min) by doing some R+D with inserts and speeds and feeds. If anyone has machined 4130 before and has any ideas how to break a chip, I hope you'll post your ideas. Thanks.