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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 the QuickShip Program

Our most popular models of Linear Actuators and Rotary Unions are available for 24 Hour shipping. You can get select Screw Jacks shipped in as little as 1 week. To find out which models are available for this program click here to view our full PDF

"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.