The other Haas was running some spacers, taking .030 depth per pass, in low carbon steel.......Wow! Pretty deep hole! The longest I have ever done was 6” @ 10mm diameter. I got lucky as they did meet correctly.
The other day, I was taking a SMALL skim up pass on some 316 SS 2.5“ tubing. The lathe motor was not happy. It has a 1 1/2 hp motor but I really think it is a gerbil powered motor! Anything over .010” even with a new insert was not going to happen.
Pierre