Tooling For Criterion Boring Head

[NCjeeper]

Can anyone confirm how the little dial thingy works???

I don't trust my dials so I always put an indicator on the slide when I am adjusting the next cut.

 

[rwm]

I put an indicator on it. It does in fact read in DIAMETER, not radius. So the internet is again correct.

 

[rwm]

And now that I have the tool out of the spindle, I can actually see that it says it reads in diameter on the tool! Duh....

 

[gard]

Here is some other options for boring larger holes. They were part of the kit that came with a Wohlhaupter boring head. Several different ways to assemble it. There may be more I did not think of.
Very large hole, a stack of bushings can be moved from right to left side as a coarse adjustment on diameter. There was a nut on the left side of the horizontal shaft IIRC.


smaller very deep hole,


lots of holders, bushings etc,

I know it was fairly old because the boring bars mostly used HSS bits and the internal grease had hardened to the consistency of concrete.