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I am looking for some insight on cutting 4140HT Steel. I am only familiar with cutting 6061 aluminum, so steel is totally new to me. Do you have any speed and feed tips, or any machining tips in general? I will be using mainly 7FL 1/4 and 7FL 1/8 Endmills. Please let me know, thanks!
there is a variety of carbide end mills with a variety of cutting conditions, thats assuming your using carbide . There isn't really a one answer fits all
if the tools your using are of quality then the manufacturer's website should have the recommended sfm for their cutters
Go to G-Wizard Calculator Free Trial Signup 2020 - CNCCookbook: Be A Better CNC'er and sign up for a free 30 day trial of G-Wizard Feed & Speed Calculator. I'm not connected to the company other than being a very satisfied G-Wizard user for the past 10 yrs.