Grinding wheel wears a lot in precision bore machining, particularly hard quenched material and highly viscous material. What’s more, the hole machining accuracy and surface quality of the wheel is very sensitive to changes in the morphology and grinding performance. Therefore, high-wear resistance grinding technology is of great importance. Here comes this kind of technology. The technology is mainly used in precision bore machining with material of strengthened cast iron, bearing steel, stainless steel, ceramics, etc.  Lifetime is 10 times more than that of the ordinary grinding wheel. grinding roughness Ra≤0.4.