Here are some photos of a Chandler Duplex Boring Head. I have used boring heads before, but do not understand the way this one works. Is it supposed to generate on its own, or does it work like any other boring head? I guess what I do not understand is the purpose of the dial at the top near the mounting threads. Speaking of threads, this one is a 3" with approx. 6 tpi. Anyone ever heard of this size? I imagine it is made to adapt to one of these tool holders I have listed in another post.
Any info is appreciated.....thanks..gary