Screw jacks summary banner

Duff-Norton line of screw jacks (mechanical actuators) includes mechanical actuators (machine screw and ball screw) ranging in size from 1/4 ton to 350 tons, stainless steel machine screw actuators, micro-miniature actuators, high duty cycle actuators, motorized machine screw and ball screw actuators, electric cylinders and motor control systems.

Accessories include miter gear boxes, c-face motor adapters, limit switches, transducers, visual and digital position indicators, couplings, ball screws and ball screw systems, and locking rings. Screw Jacks are also used for raising and lowering maintenance platforms, opening and closing air dampers, oven doors and sluice gates, and adjusting tooling machine beds, cable tension and workplace tables. In addition to the broad range of applications and industries for mechanical actuators, they are also used as alternatives to hydraulic and pneumatic systems.

Screw Jacks catalog


Take a look at our Screw Jacks product catalog.

View all screw jacks

Screw Jacks applications


Our Screw Jack products can be used for a variety of applications.

Screw Jacks selection guide

Selection guide 

Our selection guide will help you choose the right Screw Jacks for your application.

Screw Jacks engineering data

Engineering data

Take a look at the engineering data for our selection of Screw Jacks.

Screw Jacks motorized performance

Motorized performance

View the motorized performance details for our Screw Jack products.

Screw Jacks power transmission

Power transmission

Duff-Norton offers all of the components necessary to complete your power transmission system.

Screw Jacks terms of sale

Terms of sale

Find out about our terms of sale documentation here.

Screw Jacks lifetime warranty

Lifetime warranty

Read up on the lifetime warranty for all Screw Jack products.

Screw Jacks guide

Screw Jacks Guide

View our full guide to the Duff-Norton Screw Jacks range.

Screw Jacks application analysis

Application Analysis Form

Fill out our Screw Jacks application analysis form to help us understand your requirements.

Screw Jacks control analysis

Control Analysis Form

Fill out our Screw Jacks control analysis form to help us understand your requirements.

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