If you want very fast cutting speeds and work with natural woods (hard and soft), and you want a great finish at the same time, this is the end mill to use. The end mill appears similar to a roughing (hog) end mill, but doesn't exhibit as many serrations. The geometry will provide a flat surface
This is one of the best end mills for single pass (full depth) cutting at very high speeds. The chip load per tooth for the 3/8" cut diameter end mill is .019 to .021 (hard woods). The IPM for this end mill at 18000 RPM is: IPM = 18000 x 2 x .019 = 684 IPM. Helix angle 30 degrees.