To choose a screw jack and bevel gearbox manufacturer, compare more than the quoted price: confirm that the supplier can match your load, travel, speed, duty cycle, mounting arrangement, environment, and integration requirements. I recommend sending a complete application specification and asking for a written proposal that identifies the configuration, assumptions, exclusions, and information still needed. At WGT, we use these details to help B2B buyers evaluate suitable industrial gearbox and screw jack configurations before ordering. The right manufacturer should explain both what its equipment can do and where an application needs further engineering review.
This guide is for machinery OEMs, system integrators, maintenance teams, and purchasing professionals sourcing screw jacks or bevel gearboxes for new equipment or replacement projects. It is especially useful when several components must work together, such as multiple lifting points driven by a shared motor and transmission. Buyers comparing domestic and export suppliers can also use the checklist to make quotations easier to assess. The selection principles apply broadly, but the final design should be confirmed against the manufacturer’s drawings and technical documentation.
A screw jack converts rotary input into linear movement to raise, lower, position, or support a load. A typical assembly includes a screw, nut, housing, and an input arrangement, with options such as a translating screw or a rotating screw with a traveling nut. Machine-screw designs are often considered for positioning and lifting applications where their operating characteristics fit the duty. Ball-screw designs may be considered when efficiency or frequent movement is a priority, but suitability depends on load, speed, braking, and operating conditions.
A bevel gearbox transmits rotary power between shafts, often where the input and output directions need to change. Buyers should confirm shaft orientation, rotation direction, ratio, mounting position, and input and output connection details. In a coordinated lifting system, bevel gearboxes may distribute drive to multiple screw jacks, but the complete arrangement requires checks for torque, alignment, load sharing, and synchronization. I advise evaluating the gearbox and screw jacks as a system rather than selecting each part in isolation.
Start with the operating task, not a preferred product name. For a vertical lift, identify whether the screw must travel with the load or whether the nut should travel along a rotating screw. For a right-angle drive, define the required shaft layout and how the gearbox will connect to the motor, coupling, or driven equipment. These choices affect installation space, guarding, maintenance access, and the way the system is controlled.
Material selection depends on loads, wear, corrosion exposure, lubrication, and the surrounding environment. Carbon steel components may suit many general industrial applications, while stainless steel may be considered where corrosion resistance is a priority; the appropriate grade and treatment need to be confirmed for the actual conditions. Bronze or other nut materials may be specified for particular screw and wear requirements, subject to the manufacturer’s design. Ask suppliers to state the proposed materials and any coating, lubrication, sealing, or maintenance assumptions in the quotation.
A manufacturer can assess a project more accurately when the request includes the operating requirements as well as the desired product. Provide maximum and normal load, travel, movement speed, number of cycles, duty cycle, input power, and expected operating hours. Include the installation orientation, available space, ambient conditions, and whether the load can create back-driving or shock loads. If any value is unknown, mark it as an estimate rather than leaving the supplier to assume.
| Specification area | What to provide | Why it matters |
|---|---|---|
| Load and travel | Rated and peak load, direction, stroke, and number of lifting points | Supports capacity and configuration review |
| Motion and drive | Required speed, input source, ratio, rotation direction, and control method | Helps establish transmission and operating requirements |
| Operating conditions | Duty cycle, ambient conditions, contamination, corrosion exposure, and maintenance access | Informs material, lubrication, protection, and service considerations |
| Mechanical integration | Mounting dimensions, shaft details, connection interfaces, and layout drawings | Reduces fit and installation uncertainty |
When preparing an RFQ, use clearly labeled sample values only if final data is not yet available. For example, “20 kN load, 500 mm travel, and 5 mm/s target speed” can demonstrate the format of a request, but these figures are illustrative and do not establish a recommended design. Ask the manufacturer to confirm the selection, limitations, and required safety provisions for the actual machine. This distinction helps prevent example numbers from being mistaken for a product rating.
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Ask the supplier how it determines capacity, ratio, speed, input torque, and configuration for your application. Request a dimensional drawing and a clear specification for the proposed equipment, including materials and operating assumptions where applicable. For multi-jack systems, ask how the supplier expects the units to be driven and what alignment or synchronization considerations apply. A credible technical discussion should address open questions instead of treating every application as interchangeable.
Confirm whether the manufacturer can review non-standard shaft ends, mounting arrangements, accessories, or interface requirements. Ask which drawings, manuals, bills of material, and inspection documents are available for the order, and agree on document approval before production where needed. Do not assume that a custom request is included in a standard quotation; ask the supplier to list the scope and any additional engineering or tooling charges. At WGT, buyers can share their drawings and application details so we can discuss the relevant configuration and clarify quotation requirements.
Clear communication matters from initial selection through delivery and after-sales questions. Check who will respond to technical queries, how drawing revisions are managed, and what information is needed to resolve a service issue. For export projects, confirm packaging, shipping terms, destination requirements, and responsibility for any requested documentation. Keep these points in writing so procurement, engineering, and the supplier are working from the same agreed scope.
Pricing depends on product configuration, capacity, materials, accessories, customization, order quantity, and delivery requirements. Ask for a quotation that separates the equipment price from optional items, engineering work, packaging, and freight where applicable. Minimum order quantity and lead time can vary by model, configuration, and production schedule, so request current order-specific terms rather than relying on a general estimate. Compare quotations on the same technical basis; a lower price may not include the same materials, documentation, or scope.
Before choosing a manufacturer, confirm that you can answer the following questions: What is the maximum load and travel? What speed and duty are required? How many units operate together, and how are they driven? What are the mounting, shaft, material, environmental, and documentation requirements? Which values are confirmed, and which still need engineering review?
Then send the same RFQ package to the manufacturers under consideration and request a written response covering the proposed configuration, technical assumptions, exclusions, price basis, MOQ, lead time, and available support. Review the response with your engineering and procurement teams before approving drawings or placing an order. If the application involves suspended or personnel-related loads, unusual shock, or other safety-critical conditions, identify those risks explicitly and obtain qualified engineering review.
The best screw jack and bevel gearbox manufacturer is the one that can demonstrate a clear fit between your application requirements and its proposed equipment, while documenting assumptions and support scope. Define the load, motion, duty, environment, and interfaces first, then compare suppliers on engineering response, configuration, documentation, commercial terms, and communication. This approach helps reduce specification gaps and makes quotations more meaningful without treating a generic product description as an application approval.
To take the next step with WGT, prepare your application data, layout drawings, and any relevant interface specifications, then request a configuration review and quotation. If some requirements are not yet confirmed, identify them as open items so they can be discussed before final selection. A complete, shared specification is the most practical starting point for evaluating a screw jack and bevel gearbox solution.
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