I haven't had much experience using a roughing end mill in a cnc machine previous to this part so I am a bit in the dark on how to run it. We have a lot of material to remove so it's important I get it right so we don't burn through tools! The material is 4140A, the set-up is not an issue, plenty to grab by in the vice. I am using a HSS 3/4 diameter x 1-5/8 length roughing endmill, machine has 20HP. I am side milling, the required depth is 1.5 inches. My initial numbers are 1.5 axial depth of cut, .116 radial depth of cut, speed 500 RPM and feed of 6.6 ipm. After the first piece the endmill seems to be cutting fine but already looks a bit worn, should I not be taking the full 1.5 inch depth at once?
Thanks for your help!
Thanks for your help!