The hardness of the abrasive refers to the ability of the abrasive surface to resist local external effects, while the hardness of the abrasive tool (such as whetstone) is the firmness of the binder bonded abrasive when subjected to external force, which is one of the basic characteristics of the abrasive. Grinding is achieved by using the difference in hardness between the abrasive and the workpiece to be researched. The higher the hardness of the abrasive, the stronger its cutting ability.
