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Ball Screw Jack

Standard model capacities from 1/4 ton to 100 tons. Metric capacities from 5 kN to 200 kN.

ActionJac™ Worm Gear Ball Screw Jacks use a ball screw and nut made from hardened alloy steel with hardened bearing balls carrying the load between nut and screw. This rolling action reduces friction between the nut and the screw permitting smooth and efficient movement of the load. Because of the greater efficiency and rolling action, the ball screw can operate at higher speeds and increased duty cycle when compared with the Machine Screw Jack.


  • 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
  • Premium finishes including Epoxy, Outdoor, Marine, or per customer specification.
  • Use individually or in multiple screw jack arrangements


  • No "standard" travel lengths (built to specification). 
  • Ductile iron housings proportioned to support the rated capacity of the unit. 
  • 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.

Engineering Tools

Ball Screw Jack Engineering Calculators, Engineering Tools, & Technical Information. A comprehensive library of helpful ball screw jack resources.

Product Selector

Easily design your own ball screw jack system based on your unique application with the DESIGN GUIDE PRO tool. Enter your individual parameters to determine the best product fit.

Get Your Project in Motion

  Collaborate with a linear motion experts regarding your application for the ideal solution that best meets your performance requirements and budget.


A lift shaft moves through the gear box and extends out from the top or bottom. Integrated nut and worm gear for synchronized rotation. When the lift shaft is held to prevent rotation, it moves linearly through the gear box to move the load. Learn More


A lift shaft moves a nut as it turns and is fixed to the worm gear and extends out the bottom or top of the jack. The load (attached to travel nut), moves along the lift shaft. Learn More


Moves a load through an arc, such as tracking antennas, hinged doors or air dampers. One clevis is mounted on the end of the lift shaft and the other clevis is welded to a heavy duty stem cover, which is welded to the housing. Learn More


Prevents rotation of the lift shaft with a square guide attached to the screw translating inside a square stem cover. The square stem tube is supplied with lube fittings. A lift shaft moves through the gear box and extends out from the top or bottom. An integrated nut and worm gear rotate together. When the lift shaft is held to prevent rotation, it moves linearly through the gear box to move the load. Learn More

Inch Ball Screw Jacks

ActionJac™ Ball Screw Jacks have been designed to produce rated output forces with a minimum amount of input torque. Ball screw jacks use a worm gear set arrangement with an efficient ball screw and nut that reduces the amount of input torque to approximately one third the torque required for the Machine Screw Jack. Part Number Reference

Metric Ball Screw Jacks

Nook Industries has expanded the ActionJac™ offering to include metric models providing design engineers a globally accepted product. All the efficiency advantages that come with ball screw technology are available in ActionJac™ Metric Ball Screw Jacks. A full line of IEC motor mounts are also available. 

Part Number Reference

Ball Screw Jack Accessories

Nook Industries offers a wide assortment of screw jack accessories to accommodate specific applications. From motor mounts to limit switches to lubricant, Nook can easily configure a complete screw jack system.

Start with a base screw jack and add accessories to configure a complete linear motion system. Some accessories include:

Hardware Power Sensing & Control
  • Line Shafting
  • Gear Boxes
  • Couplings
  • Bellow Boots
  • Support Bearings
  • Motor Mounts
  • RA Reducers
  • AC Motors
  • Stepper/Servo Motors
  • Handwheels
  • Sensors
  • Limit Switches
  • Counters
  • Encoders
  • Control Panels

And many more...


Configure a Complete System