worm gear jack

These worm gear screw jacks are extremely precision and reliability, it could meet all of the necessary protection, cost-efficiency, and toughness mandates of your application. High strength bronze worm gear is used, the payloads from 0.5T to 100T . A complete of 11 sizes are available, each in a traveling nut version and a basic version.

Worm gear 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: Standard, Anti-rotation, Anti-backlash or Safety nut
Standard and customized end fittings, installation options, and drive shaft
Worm Equipment Screw Jack systems are Worm Gear Jack ruggedly designed and produced in standard versions with load handling capacities from 1/4 ton to 100 tons. They may be used separately or in multiple arrangements. There are no “regular” 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 aluminum housings.

Each Worm Gear Screw Jack incorporates an alloy steel worm which drives a higher strength bronze worm gear (drive sleeve). The worm shaft is supported on antifriction tapered roller bearings with exterior seals provided to prevent loss of lubrication (sealed radial bearings on the MJ, 1/4 , 1/2, and 1 ton models). The drive sleeve is certainly backed 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 higher strength bronze worm gear (drive sleeve). The worm shaft is supported on anti-friction tapered roller bearings with exterior 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, 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.