New grinding wheel for automatic granite polishing machines, characterized by the fact that the gripping washer is replaced by a threaded cap to the inner annular wall of the base of the wallet-free housing that also has an internal height suitable, of the whole thereof, an annular step of horizontal or inclined plane, or combination thereof, depending on the type of cylindrical head, inverted truncated cone or combination thereof, of the cylindrical wheel that rests against said step annuls and by tightening the cap, when screwing, against the entire anterior surface of the grinding wheel head, while its rear surface sits and accommodates in the inner rung of the grinding wheel against which it is pressed by the same thrust action the threading of the grinding wheel. The lid. (Machine-translation by Google Translate, not legally binding)
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