Just wondered how deep you guys make your cuts when machining billet bars for instance on a CNC lathe.

I use U2.5 which takes 5mm off overall but a mate at work used to test tips for SECO and reckons you can get away with 4-5mm per side which he uses all the time.

He scares me sometimes. He had to put a 45 degree internal angle inside a billet bar yesterday and came down from 60 to 45mm in one cut