Duff-Norton manufactures Screw Jacks, Linear Actuators, Electric Cylinders, Rotary Unions, Acme and Ball Screws & Nuts and Rail Maintenance Equipment. Since 1883, Duff-Norton has earned a reputation for reliable, high quality products meeting the industrial lifting, positioning, and process heat transfer needs of our customers worldwide. Duff-Norton has been ISO 9001 registered since 1994. Our products are specially designed for a variety of industrial and commercial applications. The primary markets we serve include; steel forming equipment, packaging, industrial machinery, electrical & electronics, food and beverage, ergonomics, construction, printing, tire & rubber, paper, metal industries, wood products, metal fabrication and communications.