... and casting grinding. Treatment of materials, causing loading of the wheel surface (brass, copper, aluminium). F22-F36 Surface grinding with ... lapping of the cutting tools and the steel billets, thin edge sharpening, preliminary honing F180-F280 Finish grinding of metals, ... grinding finish honing F230-F600 Superfinishing, finish honing, thin edge lapping, thread grinding of pieces with a fine pitch, ...