Quote Originally Posted by Christophe Mineau View Post
Thanks for the suggestion Brian, I agree.
I also saw someone not really boring the whole inner stuff , but digging just a groove at the tip, corresponding to the inner diameter of the ring, then parting off. He shapes a special carbide tool for doing that.

I am yet more scared, having read since that the chips can be easily flammable, especially if I try to grind the Titanium.
Have you any experience regarding that ?
From my experience running over 450 RPM's and producing a small chip could result in some fire action. I keep the rpms down now and a small bucket of sand near by just in case. Below is a clip of some Titanium being lit.

https://video-atl3-1.xx.fbcdn.net/v/...32&oe=57A903F5