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Screw Jack

ActionJac™ Worm Gear Screw Jack systems are ruggedly designed and produced in standard models with load handling capacities from 1/4 ton to 100 tons. Metric capacities are also available from 5 kN to 200 kN.

  • No "standard" travel lengths (built to specification). 
  • Ductile iron housings proportioned to support the rated capacity of the unit. 
  • Use individually or in multiple screw jack arrangements
  • Alloy steel worm drive with high strength bronze worm gear (drive sleeve).
  • Anti-friction tapered roller bearings with external seals to prevent loss of lubrication.
  • The drive sleeve is supported on anti-friction tapered roller or ball thrust bearings.
  • Premium finishes are available including Epoxy, Outdoor, Marine, or per customer specification.

Selecting the Proper Screw Jack

Machine Screw Jack

Advantages

  • Low noise (no rolling components)
  • Ideal for vertical and light loads
  • Pre-loaded nut assembly reduces backlash
  • Safe for static loads
  • Lower cost

Ball Screw Jack

Advantages

  • Improved speed, force, duty cycle, acceleration
  • Longer life cycle (low friction)
  • Requires less motor power
  • Greater positioning accuracy
  • Higher static load and lower dynamic load

Stainless Steel Screw Jack

Advantages

  • Corrosion resistance for demanding environments
  • Low noise (no rolling components)
  • Ideal for vertical and light loads
  • Pre-loaded nut assembly reduces backlash
  • Safe for static loads

Design Guide Pro Product Selectors

Design your own screw jack system with the easy to use DESIGN GUIDE PRO tools. Enter your specific parameters to design the ideal linear motion solution based on your individual application. 

Anode Screw Jacks for Aluminum Smelting

Nook can provide customized anode screw jack solutions to aluminum smelters that are seeking to replace older obsolete/failing systems. We can readily provide new, cutting edge anode screw jack designs to upgrade these facilities while significantly improving the efficiency and throughput of the overall smelting process.