To select an industrial screw jack or bevel gearbox, begin with the machine’s load, movement, operating cycle, environment, and required service life—not with a product size alone. A screw jack is generally selected to raise, lower, push, pull, or position a load; a bevel gearbox is selected to transmit and redirect rotary power. When both are used together, confirm that the gearbox can provide the required input speed and torque while the jack handles the application’s axial load and motion. WGT can help review these requirements and identify the information needed to develop a suitable configuration.
Start by describing what the mechanism must do and how it connects to the wider machine. A screw jack may move a platform, gate, fixture, or machine component, while a bevel gearbox may transfer drive around a corner or distribute rotary motion within an assembly. Identify whether the movement is vertical, horizontal, inclined, or part of a synchronized system. This context helps prevent a component from being selected using a load or torque value that does not represent actual operating conditions.
Document the normal load and the highest credible load, along with the direction in which each acts. Note whether the load is centered, offset, supported by multiple jacks, or subject to vibration, impact, or changing forces. If several screw jacks lift one structure, explain how they are connected and synchronized, because unequal loading can affect the demand on individual units. Do not assume that a gearbox or screw jack can accommodate side loads unless its technical documentation confirms the arrangement.
As an example of how to organize an inquiry, a project brief might list a 10 kN working load, a 500 mm travel, and a target speed of 20 mm/s. These figures are illustrative inputs only, not a WGT product specification or a recommendation for a particular model. The actual design must account for load distribution, support conditions, duty, safety requirements, and the selected equipment’s documented ratings.
For a screw jack, state how far the load must move, how quickly it must move, and how often the motion repeats. Include the expected operating hours, starts and stops, dwell periods, and whether the equipment may run continuously or intermittently. Duty affects thermal and mechanical considerations, so a selection based only on peak load may be incomplete. If the machine uses multiple jacks, specify the required movement relationship and the method used to coordinate them.
Confirm whether the application calls for a translating screw or a rotating screw arrangement, and describe the available mounting space and attachment points. The choice can affect how the jack integrates with the structure, motor, and connecting shafts. Also identify the required screw end, protective covers, and any travel limits or position feedback needed by the machine. Confirm these details against the supplier’s available configurations rather than assuming that every arrangement is interchangeable.
Decide how the load will be held when the drive stops. A self-locking tendency should not be treated as a substitute for a safety brake or other holding method where the risk assessment requires one. Back-driving behavior depends on the design and operating conditions, so request written confirmation for the proposed configuration. If people or valuable equipment could be exposed to movement, include the required holding and protective measures in the project specification.
For a bevel gearbox, identify the driver, driven equipment, and required direction of power transmission. Provide the input speed, desired output speed or ratio, required torque or power, and shaft arrangement. Describe whether the gearbox will operate in one direction or reverse, and whether starts, stops, or load changes are frequent. These details help a supplier assess the ratio and configuration rather than matching a gearbox to a single nominal power figure.
When a bevel gearbox drives one or more screw jacks, treat the gearbox, shafts, couplings, and jacks as a connected drive system. Confirm that the ratio provides the required jack input speed and that the available torque is adequate for the operating conditions. Account for transmission losses and the requirements of connected components using the relevant manufacturer data. Ask the supplier to review shaft sizes, rotation direction, mounting orientation, and connection interfaces before freezing the machine layout.
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Do not select a gearbox solely because its ratio appears to produce the desired speed. Torque demand, input power, service conditions, shaft configuration, and installation constraints also matter. If a motor is already specified, provide its nameplate information and control method; if it is not, state whether motor selection is part of the sourcing scope. This avoids treating the gearbox as an isolated component when the application depends on a complete drive arrangement.
Describe the operating environment, including temperature range, dust, moisture, washdown, corrosive exposure, and outdoor use where relevant. State how the equipment will be mounted and whether access is limited for lubrication, inspection, or replacement. The appropriate housing, materials, seals, finish, and protection depend on the actual exposure and product configuration. Avoid specifying a protection level or material based on a generic assumption; confirm the requirement and available options with the supplier.
Check the complete envelope before ordering. Allow for the jack body, screw extension, motor or gearbox, coupling, guards, and service access across the full stroke. Verify that the structure can support the loads and that alignment can be maintained under operating conditions. A layout drawing or interface sketch can reveal conflicts earlier than a component list alone.
| Component | Information to provide | Why it matters |
|---|---|---|
| Screw jack | Load, travel, speed, duty, mounting, screw arrangement, and holding requirements | Defines the mechanical task and integration needs |
| Bevel gearbox | Input speed, torque or power, ratio, shaft arrangement, rotation, and environment | Supports drivetrain and installation review |
| Combined system | Number of jacks, connection layout, synchronization method, and motor details | Allows the connected components to be assessed as a system |
Another common gap is requesting a quotation without stating the intended operating environment or required documentation. This can lead to repeated clarification and makes it harder to compare offers on an equivalent basis. If a requirement is not yet fixed, mark it as provisional and ask what information is needed to finalize it. Keep assumptions visible so they can be reviewed before purchase.
Prepare a concise application brief before contacting suppliers. Include a machine sketch or layout, load and motion data, drive information, installation conditions, and any mandatory interface or safety requirements. Separate confirmed requirements from estimates, and identify the person who can approve technical substitutions. A complete brief supports a more focused review and helps suppliers flag missing information early.
Request the applicable technical data for the proposed configuration, including rated capacity or torque, operating limits, dimensions, mounting details, and maintenance requirements. For a combined system, ask the supplier to confirm the proposed interface between the gearbox and screw jack and to identify any assumptions in the selection. If your machine needs synchronized movement, clarify how synchronization will be achieved and what system components are included. Evaluate quotations against the same scope so that differences in configuration or service are clear.
WGT supports B2B buyers evaluating industrial screw jacks and bevel gearboxes for machinery applications. Share your operating requirements and interface information so the application can be reviewed before you finalize the specification. Where project details remain open, WGT can help identify the inputs needed for a more complete selection discussion. Final suitability should be confirmed against the technical documentation for the exact proposed configuration.
The right industrial screw jack or bevel gearbox is the one that matches the real load, movement, drive, environment, and installation requirements of your application. Define those conditions first, then assess component ratings and system compatibility using product-specific data rather than assumptions. For a combined drive, verify the gearbox, connecting elements, and jacks together, including the required holding and synchronization approach. As a next step, send WGT your application brief, drawings, and known operating figures to request a focused selection review or quotation.
Contact us to discuss your requirements of Industrial Screw Jacks & Bevel Gearboxes. Our experienced sales team can help you identify the options that best suit your needs.