Several mini-projects at the same time, neither which is very ground breaking but felt I had to share this crazy boring bar I made, which I'm slightly amazed at how well it ended up working.
I needed to bore a 19cm/7.5" deep hole which is quite outside of what I usually do.
Cut down a 26mm bar of mystery metal, spun it down to 18mm shank, 22mm "collar" and then a ~20mm shaft.
Clearly visible is that I hit chatter-town when I was lathing the bar down after having pressed the boring bar in.
At the end of the shaft I bored out an offset hole where I could press in a cheap 12mm boring bar(DCMT070202 insert).
The boring bar now has a reach of 220mm from tip to "face" of the boring head.
Took a bit to find the right feeds/speeds, it seems to like less RPM and more feed to keep it engaged.
Taking off ~1mm radially each run.
Still works amazingly well considering that it's a 11xD cutter.