Safety requirements for grinding wheels

1. The diameter of the grinding wheel chuck shall not be less than one-third of the diameter of the installed grinding wheel. The diameter of the grinding wheel chuck for cutting off the grinding wheel shall not be less than one-quarter of the diameter of the installed grinding wheel. 2. For any type of grinding wheel chuck, the diameter of the left and right parts and the radial width of the clamping surface must be equal. 3. The surfaces of the grinding wheel chuck should be smooth, without sharp edges, and well balanced. 4. All rotating parts on the grinding machine, such as grinding wheels, motors, pulleys and workpiece headstocks, must be equipped with protective covers. The protective cover should be firm and its connection strength should not be lower than the strength of the protective cover.