Got a tuff little job for tomorrow morning...
I'm making a new end of an air cylinder. Start with a 3.5 by 3.5 block
1.5" thick. Center and turn in the lathe so you now have a 2.5" round protruding 0.25".Now for the tuff part, turn a groove 0.062" wide on the face right at the 2.5" round. (This holds rubber ring seal). I've turned a groove on a face in the lathe before, but never with the protrusion in the way.
I started grinding a little tit on the end of a cutoff HSS tool. I can see this effort will break right off. I'm thinking to try mangling a two flute endmill in the morning.
Maybe somebody has a better idea.
Karl