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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.

Introducing System Controls for our commercial actuator series!

With the proper handset and control box the user can either operate multiple actuators synchronously or independently. Our synchronized systems are capable of synchronizing two linear actuators and with two independently operated actuators; while our independently operated systems can control up to 4 actuators. Most system components are in stock so contact us now to get started!

"Design Online"
Save Engineering Time. Duff-Norton's website was first in the industry to offer 'Designs On Line'. This 2D/3D modeling page that allows our worldwide customers to download our Linear Actuators including Mechanical Actuator (Screw Jack), Electric Actuator and Electric Cylinder models directly into their project designs in a format for their specific CAD system. Click the "2D/3D Modeling" link above to enter our 'Designs On Line' modeling page.

DWA Series Rotary Union

The NEW DWA Rotary Union from Duff-Norton is a reliable and economical way to solve your process heating and cooling solutions. It is designed for water, non-corrosive fluids and oil applications. The new DWA is well-suited to a wide variety of applications and industries. For more information about the DWA Rotary Union Click here


Duff-Norton's CMLA is our NEWEST addition to our linear actuators. The CMLA is a global product line developed in conjunction with sister company Pfaff-Silberblau.

New CMLA Linear Actuator
The CMLA is an electromechanical actuator line with a variable configuration covering the 2,200N to 8,900N category.

  • Precision ball screw or self locking trapezoid screw with stroke lengths of up to 30 inches
  • Customized gear sets for variable speed configurations
  • Full range of AC motors
  • Electric brake and internal adjustable stroke limits
  • Emergency overload clutch
  • IP66S protection
  • Anti-rotational translating tube

Click here to download a copy of the CMLA flyer.