Duff-Norton Modular Actuators


Duff Norton modular actuators are made for a variety of applications.  They are custom made by matching standard actuators with electric, air, hydraulic or explosion proof drive units.

Duff Norton translating tube machine screw models feature a traveling lift nut which allows precise load positioning.  Translating tube actuators are used when environmental contamination is anticipated as they have an enclosed lifting screw and translating tube.  For use in locations relatively free of dust, dirt and moisture.

Optional limit switches and transducers are available on the translating tube machine screw modular actuator.

Modular - Rotating Ball Screw-image

Modular - Rotating Ball Screw

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Modular Actuators - 100 to 2,000 lb.

RATED LOADS: from 2,000 lbs, varies with gear ratio and motor HP
STANDARD STROKE: up to 24 inches
SPEED: to 170 in/min (varies with load and HP/RPM of motor)


  • Integral 56 frame, C-face mounting flange
  • A three-piece flexible coupling for easy motor assembly included
  • Four threaded holes in the base for standard clevis end accessory attachment. Tapped 1/2-20 UNF-2B
  • The ball-bearing screw type and mating nut with rolling contact reduces friction to a minimum which allows for higher speed, longer life, and lower power requirement
  • The steel worm and bronze gear set make operation quiet. Available in 5:1 and 20:1 ratios
  • Rugged, lightweight aluminum housing is corrosion resistant
  • Standard grease fitting on housing for easy lubrication of worm gear
  • Stop-disc at the end of the lifting screw prevents inadvertent run-off of ball nut

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