I disagree. When I went from a Okuma lathe to a swiss, the guy showing me the ropes was going WAY slower than I did on the Okuma. I talked him into trying my way (faster, getting the chip to break, etc...). It failed with broken inserts.
Go 300 SFM to start, low DOC (try .05 but be ready to go less), and do not exceed .002 feed rate. I'd try .001 to start when roughing. When finishing, .0005 is not too slow (amazing to somebody trained on regular lathes, like me). I've been told the oil (coolant) can't take the heat away at the higher SFM and feed rates but it does improve lubricity which is why the slower feed doesn't kill the inserts. I'm not sure if that's correct but it does work.
The chips are the biggest problem. Less DOC might work. |