​It is composed of a double raceway inner ring, outer ring, two rows of rollers and a cage, characterized in that both ends between the inner ring and the outer ring are equipped with a sealing ring, sealing ring by the outer ring on the sealing groove
Its extruder, cylinder and screw rods are made of quality alloy steel that have been notarized and processed in a precision way. Hence it is hard, durable in corrosion resistance. The specially-designed screw is quality in plasticizing, which helps increa