Quote Originally Posted by dertsap View Post
sandvik has a great software calculators for this ,the sfm is far different using their calculator than what you see on the back of the insert box , it takes into account the material , insert grade , depth of cut engagement , tool dia , # teeth , and calculates it to cubic inches per minute removal , which makes more sense , and the speeds are unreal
Funny you mentioned this. With my Sandvik 390, the online calculator said 1300 SFM for cutting 1018/1020 steel. I had a real hard time believing the recommendations. I expected to trash $100 worth of inserts on the initial engagement, but it ran great.