1. The diameter of the grinding wheel plate should not be less than one third of the diameter of the mounted grinding wheel. The diameter of the grinding wheel plate for cutting the grinding wheel should not be less than a quarter of the diameter of the mounted grinding wheel.
2. For any type of grinding wheel plate, the diameters of the left and right parts and the radial width of the pressing surface must be the same.
3. The surface of the grinding wheel must be smooth, without sharp edges and well balanced.
4. Grind all the rotating parts of the machine, such as: grinding wheel, motor, pulley and workpiece head frame, etc., should be installed with a protective cover. The protective cover must be strong, and its connection strength should not be less than the strength of the protective cover.