Hello
I usually take a cut down then back out, offset tool by 0.5mm go back in. Back out again then offset 0.5mm the opposite side then go back it. Repeat in till you cut through.
When I was a training on the lathe one big no no was leaving a chuck key in a stationary chuck while been set in high revs. Turning lathe on launched the chuck key like a missile and ended up embedded in the block wall at back of the class.
