I run a lot of 1/2" carbide endmills in 1018. My question is what is the formula for figuring out chip thinning. Say my endmill specs 475 sfm and is 4 flute and recommends .003 to .005 per tooth. Now that is running it the standard way, not high-speed machining. Usually, I like to cut the full length of flutes or full depth of pocket at 10 percent dia. of a cutter. But I am always guessing on the speed and feed. So is there a formula for chip thinning?

Thanks in advance.