[GeeTwo]

Originally Posted by Steven Smith

https://www.google.com/search?q=bori...eF4Gbs20_JM%3A

Sorry for messy link and brevity, on my phone. The tool is held in a mill.You can adjust the offset of the boring bar (cutter) to get a precisely dimensioned hole.

Thanks. I used that to find this link, which shows the a boring head with the boring bar installed. Three images further down on that page there is an animated gif that shows it in action.

And no, we don't have a mill. I've never actually seen a mill (or if I have, I didn't know it was a mill).