I've got a requirement to profile machine 303 or 304SS which I've never done before. I've got a Fadal VMC40 which is normally used for alum. I'm profiling 0.5 in thick stock (edge only) and I've got a couple of questions regarding tools and procedure. The tool(s) would be 3/4in dia and maybe 1/2in dia for finish if I need it.
1. Since I need a good finish on these parts I'm looking at either the Garr VRX or OSG Exocarb Aero (2046). The Garr literature suggests I would have to take a finish cut with a 5-flute...would I have to do that with the OSG?
2. I've seen demos of both Garr and OSG with the Garr using flood cooling and the OSG just air. Don't know if I'm comfortable using just air at this point...any reason I couldn't use flood with the OSG? (My credo has always been "Discretion is the better part of Valor!"
3. How thin a cut can I get away with? In one spot I may be just skinning the surface, maybe about .006-.010. I read somewhere that SS easily work-hardens. Is that going to be a problem?
4. I've got the choice of either material and read somewhere that 304 machines better...true?
I've had awesome results on 304L SS using Data Flute solid carbide endmills, run dry with a good air blast to insure no re-cutting chips, climb cutting. In this case the mfg guidelines work very well.
I like OSG, but have stuck with the Data Flutes because they been so good.
Just be careful about how you're cutting inside corners, with too much peripheral tool radius you can get chatter.