If a diamond wheel can be used on steels and CBN on carbides？

if a diamond wheel can be used on steels and CBN on carbides.   We do not recommend this as the wheel life will be greatly reduced and in some cases, the wheels may not even grind at all. A diamond wheel is specifically used for carbides, plastics and other synthetic materials. A diamond wheel will not grind steel well at all, because it will be loaded by chips from steel and will react with steel which will shorten tool life. CBN wheels should only be used on steels. There is a hybrid grit available that will grind both; However, it is a compromise in wheel life and grind-ability. But in cases where you must grind both materials at the same time, it can be a real time saver.