There are soo many variables involved like, type of machine, grade of carbide, chip break style the list goes on and on........I will admit that the first thing I do when cutting something new to me, or a new tool to me is hit the books, or call the tech dept for the specific tool manufacturer. I will say though, that even uncoated carbide should be able to handle 500sfm safely and 1000 rpm and 40ipm sounds like a pretty heavy chipload. Once again how many inserts? Lots of variables. The other thing is that even though it may sound like **** does not neccessarily mean that your speeds and feeds are wrong. Some tools need to be beaten on to last. Just like running some grades of carbide dry, a little disconcerting at first seeing sparks and glowing chips but they like it!