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.