Building a grinding guide (or jig) to grind a High Speed Steel thread cutting tool using my new CBN wheel and grinder. CBN grinding wheels are used to grind hard materials such as hard ferrous materials, hardened steel, bearing steel and nickel based alloys. CBN is an acronym for “cubic boron nitride” and is the second hardest material known to man, right behind diamond. It grinds HSS fast and with less heat build up than any other material.
