Cutting an outer ring.

[Blogwitch]

It is very easy to do using the mill and RT. Watch the first part of this vid to see it being done. No special cutting tools needed.

[ame]https://www.youtube.com/watch?v=P1ifPuImERA[/ame]


John

 

[xpylonracer]

My vote would be with the jigsaw method to cut the circle, then a boring tool with the job held in the 4 jaw. The chap asking the question sounds like he's new to lathe work so suggesting trepanning ups the rate of difficulty, even experienced operator's do experience problems and they know about tool grinding, speeds and feeds.
Emgee

 

[RogerP]

The mill method is probably the best way BUT I don't think that the OP has the equipment. Yet