I'm trying to decide if I can get by with a lathe that has only live tooling and a C-axis or whether I actually need a full Y-axis. I'm looking at a Haas as one of the choices, but the question isn't really specific to only a Haas.
We frequently cut keyways on shafts and the tolerance required is usually + or - .001 from nominal size. Can this be done reliably and with good results using only a C-axis with live tooling? It seems to me that the sides of the keyway would not be parallel, causing the top of the keyway to be loose and the bottom of the keyway to be tight.
With a Y-axis, this would not be a cause for concern and an endmill that is smaller than the size of the keyway could be used for precise size adjustments.
I have never used or purchased a lathe with live tools and I'm looking for some opinions from people who do this all the time who can speak to the results. Anybody do this on a regular basis?