Diamond and CBN wheels are the main products of superhard abrasives, with the type of straight, cup, dish and others etc. Diamond abrasive products are used for grinding hard alloy cutting & measuring tools, HSS mould and brittle non-metals such as optical glasses, ceramics and gems etc. CBN abrasive products ate used for grinding alloy steel, bearing steal etc. The method of grinding includes surface, cylindrical, plunge-cut and profile grinding.