Duff-Norton offers a complete line of both standard and custom engineered machine screw actuators for applications up to 350 tons.

Machine screw actuators offer positive mechanical action, precise positioning, and uniform lifting speeds. Standard configurations include upright or inverted units with translating or rotating lifting screws, and top plate, threaded, or clevis ends. The anti-backlash option reduces vertical backlash resulting in smooth, precise operation and minimal wear.

For harsh environments, Duff-Norton offers a complete line of stainless steel machine screw actuators in standard and special configurations for loads up to 100 tons.

Duff-Norton Stainless Steel actuators incorporate all of the same features as Duff-Norton's standard machine screw actuators, but can be used in severe environments where other materials are inadequate. All exposed surfaces are made of 316 stainless steel including the lifting screw, housing, shell cap, worm and dust guard. Options include: anti-backlash and keyed lifting screws for translating screw models.

Duff-Norton Ball Screw actuators come in many standard models, or can be custom designed for any application up to 50 tons.

Duff-Norton Ball Screw actuators provide high efficiency and high speed in one linear positioning package. The positive action of the low friction ball screw and nut design provides longer life at load and requires less power to achieve a specified thrust. Ball screw actuators can be used individually, in tandem or as part of a larger mechanical system. With lifts up to 20 feet, Duff-Norton Ball Screw actuators offer the perfect solution to many linear positioning applications.

 Duff-Norton Micro-Miniature actuators provide extreme precision in a compact package. Accurate to within .001 inch, and equipped with anti-backlash nuts to minimize vertical backlash between the screw and worm gear nut, these units are available with either balanced, or continuous dial readings for perfect positioning every time.

Standard Duff-Norton Micro-Miniature actuators come with aluminum shell caps and housings and include stainless steel worms and lifting screws. These actuators are also available with stainless steel shell caps and housings.