FIELD: grinding materials. SUBSTANCE: cylindrical rotor with ribs define the grinding chamber together with the housing with ribs. The grinding chamber is vertical. The rotor is suspended on the drive by way of a universal joint. The bottom of the housing has the spherical surface. The radius of the spherical surface is equal to the distance between the bottom and axis of the universal joint. The ribs of the rotor can be made up as a comb. EFFECT: improved design. 2 cl, 2 dwg
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