A hydraulic three-roll mill is a device that rolls, calenders, or crushes materials using three horizontally placed rollers and a hydraulic system. Its core principle is to use a hydraulic cylinder to provide strong and precise pressure, driving the movable roller to cooperate with the other two fixed rollers to form an adjustable gap. When materials pass through the roller gap, they are processed into the required thickness or fineness under the action of high pressure, shearing, and extrusion.

It is suitable for industries such as coatings, inks, paints, rubber, cosmetics, and food.