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SCREW JACK 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.
Imperial

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Machine Screw Actuators
Machine Screw Actuators
1/4 Ton to 250 Ton
Stainless Steel Machine Screw
Stainless Steel Machine Screw
2 Ton to 100 Ton


Anti-Backlash Actuator
Anti-Backlash Actuator
1/4 Ton to 150 Ton
Stainless Steel Anti-Backlash
Stainless Steel Anti-Backlash
2 Ton to 150 Ton
Anode Jacks
Anode Jacks
Anode Jacks
Micro-Miniature Actuators
Micro-Miniature Actuators
500 to 1,000 lbs.
Ball Screw Actuators
Ball Screw Actuators
1/2 Ton to 50 Ton
Continuous Duty Cycle
Continuous Duty Cycle
3,500 lbs. to 27,000 lbs.


Metric

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Machine Screw Actuators
Machine Screw Actuators
5kN to 200kN
Anti-Backlash Actuators
Anti-Backlash Actuators
25kN to 200 kN