Cylindrical grinding, the correct choice of the grinding wheel is to ensure that the workpiece grinding quality, increase productivity, reduce the cost of an important part. Select the characteristics of the grinding wheel manufacture (abrasive grain size, hardness, combined etc.), must make the abrasive grain having a good grinding performance; having a suitable grinding wheel is self-sharpening; grinding wheel is generated when the grinding force, the grinding heat is relatively small; less blunt, high life of the grinding wheel abrasive; workpiece machining accuracy and surface quality requirements to achieve the machined surface is not easy to produce burns and cracks, grinding wheel, the nature of the material of the workpiece and the grinding quality The requirement is that the two key factors that can not be ignored.