I need to machine a round billet of stainless steel on its flat face with a
square section groove to take an O ring. The OD needs to be about 60 mm,
the ID 50 mm and the depth of the groove 4 mm. I have a smallish (11 inch
swing Harrison) lathe and a Bridgeport universal mill, but very limited
tooling as I am a novice. What is the easiest way to attack this, the
billet is cicular on its OD, can be gripped in the chuch of the lathe, and
the groove will be concentric with the OD. I also have hand wheel roatable
table for the Bridgeport, although I haven't used it and am not even sure
of its proper name....rotary table?

I would probably have to buy or make a cutting tool for the lathe as I see
nothing obviously suitable amongst the stuff I have.


Thanks, the thing I need to groove was expensive and I don't want to wreck
it going in blind.

Thanks.