Duff-Norton has manufactured quality products since 1883. We manufacture Mechanical and Electromechanical Actuators, Electric Cylinders and Rotary Unions®. Duff-Norton has been ISO 9001 registered since 1994 and was ......Duff-Norton has manufactured quality products since 1883. We manufacture Mechanical and Electromechanical Actuators, Electric Cylinders and Rotary Unions®. Duff-Norton has been ISO 9001 registered since 1994 and was the first in the industry to be ISO registered and to meet the new ISO 9001-2000 standard. Our outside sales force is directly employed and handles only Duff- Norton products. To assist in providing solutions for your applications, our product lines are supported by a staff of 11 engineers with Duff-Norton experience totaling 260 years. Duff-Norton is the largest Mechanical Actuator manufacturer in the world with the largest installed base of actuators globally. Duff- Norton began building Machine Screw Actuators in 1935, Ball Screw Actuators in 1962, and Electromechanical Actuators in 1971. A Lifetime Warranty is offered for Mechanical Actuators. We have the broadest product range in Mechanical and Electromechanical Actuators. Duff-Norton can provide complete motion control systems, including sophisticated controls, at very competitive pricing. Our Rotary Union® product line has been manufactured since 1944. The Rotary Union® product line offers a wide selection of 32 series for high pressure, high speed, multiport, or swivel applications. Our Quickship programs offer fast deliveries for Duff-Norton Mechanical and Electromechanical Actuators and Rotary Union® products.