Screw jacks are gearbox assemblies combined with transmission components that, through the use of a motor, can be used to convert rotary motion into linear motion. Depending on the application, screw jacks can be used to lock, unlock, push, pull, tension, tilt, lift, lower, slide, roll, or pivot loads ranging from a few kilogram up to 120 tons.

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
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.

Protective boots available
Anti-backlash devices available
Customized mechanical jacks can be made to your specifications