"Craig" wrote in message
ups.com...
What would be the best way to cut a round bottom groove (need a few
diff. sizes-1" 11/4" and 11/2") in a piece of steel about 8-9" in
dia.?
I want to make dies for a tubing bender. Would a radius attachment
work
for something like this? Where could I find one?
Thanks,
Craig

Assuming you have access to a rather large lathe I would use tool steal
of the dia. you specified above and make a form tool mounted on an arbor
to fit your lathes tool post.

Greybeard also has a great idea using a mill and dividing head.

Bernd