After complaining about too many boring heads, I bought another. To my defense, I've only paid for two, and someone made me an offer I couldn't refuse. He knew it was a boring head, but not familiar with it past that. It looked to me like it was complete with one exception. Two of the clamping screws were missing. I know that it is good practice to take out the unused screws so they don't turn into projectiles so I assume the previous owner likely did just that. Other than that, all the parts were there and most were unused. The head was obviously used, one boring bar used, one extension bar used, and the left hand carbide cutters are both chipped. The rest looks unused. $750 to the house.
It had a 1.5" straight shank installed but an unused R8 was part of the package. I flooded it with oil to flush out the old "gunk" that was inside. Once the excess started to run clean, I figured it was probably OK to try out. Here is the first cut with it on some 7075 AL. I used an indexable 3/4" bar with the 1" to 3/4" sleeve that was in the kit.
I have 2 Criterion heads, and 3 Yuasa heads, but this one is by far the most rigid. I didn't expect to feel much of a difference between a 4" Yuasa and this one but the difference is substantial. I still have much to learn but in my world that applies to just about everything.
For the first cut, I was trying to put in enough relief to drop a washer in. I didn't set the stops, just measured the washer and gave it a try. The washer doesn't move in the hole, but I over shot the depth by .020 because I dropped the table after the first pass, (.020 deep) when I realized I was too close to slip the washer under the cutter. Went back and zero'd everything without taking into consideration the first pass. All things considered, it was much easier than the old way.
I'll be looking for left and right hand stubby indexable 1" boring bars