A screw jack lifting system combines mechanical parts that convert rotary input into controlled linear movement. Its core components are one or more screw jacks, a drive source, connecting shafts or couplings, mounting hardware, and—when needed—controls and safety devices. The right arrangement depends on the load, required travel, speed, duty cycle, installation space, and synchronization needs. In this guide, we explain what each part does and how to evaluate a complete system before requesting a quotation.
Click here to get more.
This guide is for equipment designers, machinery manufacturers, maintenance teams, and procurement professionals sourcing screw jack lifting system components. It is useful when you are developing a new lifting mechanism, replacing worn parts, or reviewing a supplier’s proposed configuration. The component names and interfaces can vary between designs, so confirm compatibility rather than assuming that parts from different systems will fit together.
We focus on the mechanical and system-level parts that commonly affect selection. Final sizing should be based on the actual operating conditions and the technical information for the selected products. Where requirements are uncertain, share the application details with a qualified supplier or engineering team before placing an order.
A screw jack uses a gear mechanism to rotate a lifting screw or nut. The screw-and-nut arrangement turns that rotation into linear movement, raising or lowering a connected load. In a system with multiple jacks, shafts, couplings, or other drive components can transmit motion between units, while a motor or hand input supplies the power.
There are two common configurations. In a translating-screw arrangement, the screw moves axially while the jack housing remains fixed; in a translating-nut arrangement, the screw typically rotates while the nut and attached load travel. The appropriate option depends on the available space, the required motion, and how the load can be guided and supported.
The screw jack is the central lifting unit. Its housing contains the gearing and supports the screw-and-nut mechanism, while the input shaft accepts rotary drive from a motor, handwheel, or connected transmission. The gear ratio and screw geometry influence movement and input requirements, but the allowable load and operating limits must come from the selected product’s documentation.
The lifting screw and nut create the linear travel. Depending on the design, the nut may be integrated into the jack or supplied as a separate component, and a protective cover or bellows may be considered where contamination is a concern. Wear, lubrication, alignment, and exposure to dust or moisture can affect service requirements, so include these conditions in the selection discussion.
A motor provides powered movement when manual input is unsuitable or when the system needs to operate as part of a machine. Couplings connect the motor to a jack or join transmission sections, while connecting shafts can distribute rotation among multiple jacks. Shaft layout, alignment, support, and access for installation all matter; an unsuitable arrangement can cause binding or uneven motion.
Bevel gearboxes may be used to change the direction of the drive or to distribute motion in a multi-jack layout. Bearings, shaft supports, keys, and other transmission parts help maintain the intended mechanical connection. Their selection should match the required orientation, transmitted load, speed, and interface dimensions specified for the system.
Base plates, brackets, and fasteners secure the jacks to the machine structure. The structure itself must be suitable for the loads and forces involved; a properly selected jack cannot compensate for an inadequately designed frame. Limit switches, position feedback, brakes, or other controls may be needed depending on the application and risk assessment, but their inclusion and configuration should be confirmed for the complete machine.
Jack types differ in how the screw or nut moves, how the unit is mounted, and how the input is arranged. Materials and surface treatments also vary by product and application. Rather than choosing by material name alone, consider the environment, expected wear, lubrication method, corrosion exposure, and the manufacturer’s stated operating conditions.
WGT supply professional and honest service.
| Selection item | What to confirm | Why it matters |
|---|---|---|
| Load | Load per jack, load distribution, and any relevant dynamic conditions | Supports appropriate sizing and system layout |
| Travel and speed | Required stroke, movement rate, and positioning needs | Influences screw, drive, and control choices |
| Duty and environment | Operating frequency, rest periods, temperature, and exposure to contaminants | Helps identify operating limits and protection needs |
| Interfaces | Mounting dimensions, shaft details, orientation, and connection points | Reduces fit and integration issues during installation |
For a simple illustration, a screw with a 5 mm lead advances 5 mm per revolution under ideal geometric conditions. A 100 mm travel would therefore represent 20 screw revolutions in that simplified calculation; actual input turns and movement can differ with the jack configuration, gearing, and system design. Treat these figures as an explanation of the relationship, not as a WGT product specification or a sizing recommendation.
For a single lifting point, the main questions are usually the load, stroke, mounting arrangement, input method, and protection requirements. A multi-point platform or machine bed adds coordination concerns: the jacks and transmission must be arranged to produce the required motion, and the structure must guide the moving load appropriately. If independent motors are used, the control strategy becomes especially important and should be engineered for the application.
In dusty, wet, or corrosive environments, discuss covers, sealing, lubrication, and material or finish options with the supplier. For frequent operation, provide the expected operating pattern rather than describing the system only as “continuous duty.” These details help a supplier determine which product data and design checks are relevant.
When comparing proposals, review the component list alongside the operating assumptions. Ask what is included, what is optional, and which limits apply to the recommended arrangement. A quotation is easier to evaluate when it identifies the proposed interfaces, configuration, and any information still needed from your engineering team.
Price depends on the selected jack type, capacity and configuration, quantity, materials or protection options, and the extent of system integration. A complete drive package may require different components and coordination than a request for replacement jacks alone. Because these details vary, request a quotation based on a defined specification rather than relying on a general unit-price comparison.
Minimum order quantities and lead times are supplier- and product-specific. They may be affected by customization, component availability, order quantity, and confirmation of technical details. Ask the supplier to state the applicable MOQ, estimated lead time, quotation validity, and any approval drawings or documents needed before production.
Choose a supplier that can discuss the application as a system, not only as a standalone jack. Confirm that they understand your load, travel, mounting, drive arrangement, environment, and duty requirements. Ask how they will verify interfaces and what technical information they need before recommending a configuration.
Also clarify the scope of supply, customization options, documentation provided, after-sales support, and communication process for technical questions. Do not assume that a claimed feature applies to every model; request the relevant product information for the exact configuration under consideration.
At WGT, we supply screw jack lifting system components for machinery applications and can discuss component selection, configuration, and sourcing requirements. To help us review your request, share the intended load, travel, speed, number of lifting points, installation layout, operating conditions, and required delivery schedule. If you have a drawing or an existing component reference, include it so we can assess interfaces more effectively.
A screw jack lifting system is built from more than a jack: the screw and nut, drive source, transmission parts, mounting structure, and controls all contribute to the intended movement. Start by defining load, travel, speed, duty, environment, and layout, then check that the proposed parts are compatible as a system. For your next step, prepare these requirements and request a configuration-specific quotation from WGT, including confirmation of scope, operating limits, MOQ, and lead time.
Contact us to discuss your requirements of Screw Jack Lifting System Components. Our experienced sales team can help you identify the options that best suit your needs.