303SS V cutting issues
I am cutting some 303. I am leaving raised text and trying different V shaped cutters to get fine detail.
I am cleaning out the flat areas with a 1/4 carbide and not having many issues with that. I didnt think the 303 would exhibit the hardening issues like 304/316.
But I am struggling with the 60 degree V cutter. I am using carbide engraving cutters from Harvey Tool, the half round style. Maybe I will try an end mill with a 60 degree tip, or a 2 flute engraver.
So, the problem - tip of the tool breaking. I only have 3500 rpms available on my mach 2 retrofitted Boss5. I will keep experimenting, but man these cutters are getting expensive. I have been trying 9ipm and 3250 rpm. I may also try to clean out more material with a different roughing strategy. But I suppose I am looking for some advice.
Anyone?
http://www.scpconcepts.com