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

Worm equipment drive screw jack
Translating(traveling screw) and rotating (traveling nut) configurations
Electric Driven and Manual Operated both can be found
Trapezoidal spindle (self-locking) and Ball Screw spindle (high efficiency) version
Design option: Standard, Anti-rotation, Anti-backlash or Security nut
Standard and custom end fittings, mounting options, and drive shaft
Worm Equipment Screw Jack systems are ruggedly designed and produced in standard models with load managing capacities from 1/4 ton to 100 tons. They may be used separately or in multiple plans. There are no “Worm Gear Jack regular” travel lengths and all Worm Gear Screw Jack systems are designed to specification.
The jack housings are made of ductile iron and proportioned to support 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 steel worm which drives a higher strength bronze worm equipment (drive sleeve). The worm shaft is backed on antifriction tapered roller bearings with external seals provided to prevent lack of lubrication (sealed radial bearings on the MJ, 1/4 , 1/2, and 1 ton products). The drive sleeve is definitely 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 worm which drives a high strength bronze worm gear (drive sleeve). The worm shaft is backed on anti-friction tapered roller bearings with external seals provided to prevent lack of lubrication. The drive sleeve is 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 Class 2-C (Centralizing) tolerances. Jack lift shaft business lead tolerance is approximately ±0.004″ per foot.