I only turn small widgets, usually, and part off using a blade type 1.5mm wide tool.
I`ve seen the hint/ tip to part off in reverse, but not tried it until yesterday.......
It works a treat!
My little lathe now
laughs at large pieces of 1" brass.
Like this "steam dome" for my boiler.
Another success!
Now I have my miller, I will make a 10mm square holder for the 1/4" tool shank.....
Happy David.