Steve Worcester wrote:

I am trying to take 1/2 square O1 down to round for about 3" of the overall
(9") length. I have been using a tool bit chucked up on the toolpost, but a
friend suggested it would be faster to use a tool post mounted grinder.
First, I wonder if he is right, and second, is there a reasonably priced
one, or plans around to make one?


Whatever you do, rough it out first on a coarse belt sander or snagging
wheel on the bench grinder (assuming it's hard). That will go a whole lot
quicker than cylindrical grinding in the lathe with a toolpost, where the
infeed will be in thousandths .. - GWE