larry g wrote:

A few days ago I asked about boring with a lathe or mill. After weighing
ideas and my limited experience I am boring with the mill. Now the
question, what is the correct way to set the boring bar in the boring head?
My boring head is the 1 1/2 criterion square head. To set it up I installed
the bar, laid the whole assembly on the surface plate and used a square to
set the cutter parallel with the centerline of the head. I figure this
should give a zero rake at the cut, as I'm cutting brass. So far so good.

So is there a correct way to set the tool in a boring head?

I acquired a couple of boring bars with 1/2" round shanks. I painted
part of the circumference of one with Dykem and fiddled around 'til I
liked the way it cut then barely loosened the set screw and lightly
tapped it enough to drag a mark in the Dykem. I then made a flat there
for easily reproducing the setup.

Ted