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

Worm equipment drive screw jack
Translating(traveling screw) and rotating (traveling nut) configurations
Electrical Driven and Manual Operated both can be found
Trapezoidal spindle (self-locking) and Ball Screw spindle (high efficiency) version
Design option: Regular, Anti-rotation, Anti-backlash or Security nut
Standard and custom end fittings, mounting options, and drive shaft
Worm Gear Screw Jack systems are ruggedly designed and stated in standard versions with load handling capacities from 1/4 ton to 100 tons. They might be used individually or in multiple plans. There are no “standard” travel lengths and all Worm Gear Screw Jack systems are built to specification.
The jack housings are constructed with ductile iron and proportioned to support the rated capacity of the unit. MJ, 1/4 ton, and 1/2 ton models have aluminum 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 models). The drive Worm Gear Jack sleeve can be supported on antifriction tapered roller or ball thrust bearings. Rotation of the drive sleeve causes the lifting screw to translate or rotate, dependant on jack configuration.
The Inch and Metric Worm Gear Machine Screw Jacks incorporate an alloy or stainless worm which drives a higher strength bronze worm gear (drive sleeve). The worm shaft is backed on anti-friction tapered roller bearings with exterior seals provided to prevent lack of lubrication. The drive sleeve can be supported on anti-friction tapered roller or ball thrust bearings. Rotation of the drive sleeve causes the thread lifting screw to translate or rotate, dependant on 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.