Duff-Norton manufactures Mechanical Actuators (Screw Jacks), Electromechanical Linear Actuators, Electric Cylinders, Rollerscrews, Rotating Joints, and Mechanical and Air Jacks. Since 1883, Duff-Norton has earned a reputation for reliable, high quality products meeting the industrial lifting, positioning, and transfer needs of our worldwide customers and has been ISO 9001 registered since 1994.