Huh, I'd say more money than brains, but clearly a lot of brains needed to make that work. Really interested how the rotary portion is attached. Edit: Watching it again, I could see the desire for some follow up shots. Not sure about 8.
When I first got my lathe I had to make a spindle clamp to hold the back side while we used various forms of leverage to get the chuck off. Is the instant reversing relay actuated by an adjustable limit switch or just manual control? I assume that's only for low speed operation like threading?
+1 on kerosene or light mineral oil on aluminum. It never fails the build occurs at the end of my final cut if I don't use lube. For threading some materials like cast iron, I'd love the thread in reverse so grit drops out, but I also have a threaded chuck. Not sure what would happen if it...
I had half nuts stick on my Leblond once. Into my carriage stop it went. Bam! Quadrant gear was the weakest link. Took a bit of brazing and filing to fix that. I remember reading about the round heads having a clutch to prevent such things. I guess mine does not, or its stuck closed.
It seems for me cleaning a barrel does something, but its never predicable. Some barrels seemed to improve, others lost accuracy till they leaded back up.
I saw you had sand paper (or emery?) in your 3 jaw chuck. Do you do this for fragile parts so less clamping pressure is needed, or to take up variations on a rough surface? Or something else? I've used paper when clamping multiple parts in a mill vise, but never in a lathe chuck.
When people refer to the "foster" fitting is the true specification the ZSi- Foster FST fittings? https://www.zsi-foster.com/fst.html This 12MP looks very close to what is used.(at least on the QD side) https://www.zsi-foster.com/mm5/graphics/profile/FOSTER-12MP-PROFILE.pdf Part of this...