Roller machines of the SGR and SVDU brands are designed for hulling buckwheat and millet grain at cereal factories, farms and individual agricultural enterprises. A distinctive feature of the SGR machines are the abrasive surfaces of rolls and decks (for buckwheat) and special rubber decks (for millet) specially made by pouring. Model SVDU (low productivity) is preferably used on fractions, the composition of which does not exceed 5-7% of the product fed for fractionation.