These worm gear screw jacks are very precision and reliability, it can meet all of the necessary security, cost-efficiency, and toughness mandates of the application. High power bronze worm gear is used, the payloads from 0.5T to 100T . A total of 11 sizes are available, each in a vacationing nut version and a simple version.

Worm equipment drive screw jack
Translating(traveling screw) and rotating (traveling nut) configurations
Electric powered Driven and Manual Operated both are available
Trapezoidal spindle (self-locking) and Ball Screw spindle (high efficiency) version
Design option: Standard, Anti-rotation, Anti-backlash or Basic safety nut
Standard and customized end fittings, installation options, and drive shaft
Worm Gear Screw Jack systems are ruggedly designed and Worm Gear Jack produced in standard versions with load managing capacities from 1/4 ton to 100 tons. They may be used separately or in multiple plans. There are no “standard” travel lengths and all Worm Gear Screw Jack systems are designed to specification.
The jack housings are made from ductile iron and proportioned to aid the rated capacity of the machine. MJ, 1/4 ton, and 1/2 ton models have aluminium housings.

Each Worm Gear Screw Jack incorporates an alloy metal worm which drives a higher strength bronze worm gear (drive sleeve). The worm shaft is supported on antifriction tapered roller bearings with external seals provided to prevent loss of lubrication (sealed radial bearings on the MJ, 1/4 , 1/2, and 1 ton systems). The drive sleeve is supported on antifriction tapered roller or ball thrust bearings. Rotation of the drive sleeve causes the lifting screw to translate or rotate, depending upon jack configuration.
The Inch and Metric Worm Gear Machine Screw Jacks incorporate an alloy or stainless steel worm which drives a higher strength bronze worm gear (drive sleeve). The worm shaft is supported on anti-friction tapered roller bearings with external seals provided to prevent loss of lubrication. The drive sleeve is definitely supported on anti-friction tapered roller or ball thrust bearings. Rotation of the drive sleeve causes the thread lifting screw to translate or rotate, depending upon jack configuration.

The threads are precision formed, typically using Course 2-C (Centralizing) tolerances. Jack lift shaft business lead tolerance is approximately ±0.004″ per foot.