FIELD: grinding of medium-hard materials. SUBSTANCE: device has body, upper disk installed in body, lower disk, and flywheel disk. Lower and flywheel disks are connected with drive shaft. Upper disk is provided with rollers arranged uniformly on its side surface and interacting with circular running path made over perimeter of flywheel disk. Rollers are eccentric and running path is flat. In another version, rollers can be symmetrical and running path be of special profile. EFFECT: high efficiency. 1 cl, 1 dwg
