FIELD: pharmaceutical, chemical and food-processing industries; devices and units used for preparation of suspensions and ointments. SUBSTANCE: proposed device includes drive and working member for grinding and dispersing crystalline powders; working member includes system of engaged spiral gears: one drive gear and two or more driven gears. Drive gear is thrown into engagement with three driven gears of similar diameter. Rather hard crystal are grounded between teeth due to considerable force of engagement. Degree of grinding is not practically impaired by wear or change in static backlash due to constant teeth pressure. Grinding may be performed in liquid and elastoplastic media. EFFECT: simplified construction. 3 cl, 3 dwg
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