... casting grinding. Treatment of materials, causing loading of the wheel surface (brass, copper, aluminium). F22-F36 ... Surface grinding with the wheel face, chisel sharpening, abrasive tool dressing, ... F100-F180 Finish grinding, lapping of the cutting tools and the steel billets, thin edge sharpening, ... .0030 0.4 black silicon carbide with silane treatment for top abrasive