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 used for cutting the grinding wheel shall not be less than one fourth of the diameter of the installed grinding wheel.
Any form of grinding wheel chuck must have dimensions such as the diameter of the left and right parts and the radial width of the clamping surface equal.
The surfaces of the grinding wheel chuck should be smooth, free of sharp edges, and well balanced.
All rotating parts on grinding machinery, such as grinding wheels, motors, pulleys, and workpiece heads, 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.
