ENGINEERING FAQ / 3 WALKERS
Practical answers on plate rolling machine selection, capacity, pre-bending, quotations, delivery and service.
Start with the material grade, maximum thickness, working width, target inside diameter, production volume and required roundness. Send these values through the inquiry form so an engineer can verify the roll configuration and recommend a published model or a custom design.
A 3-roll machine is often selected for flexible general fabrication, while a 4-roll machine can simplify clamping, pre-bending and repeat production. The better choice depends on plate thickness, material strength, diameter range, operator workflow and expected volume—not on roll count alone.
Please provide maximum and minimum thickness, working width, material or yield strength, required diameter, cone or cylinder geometry, annual volume and any relevant drawing. For example, a request for 20 mm plate, 3,000 mm width and a 2,000 mm diameter gives the engineering team a useful starting point, but final capacity must be checked against the approved data sheet.
Pre-bending reduces the straight edge or flat-end section before the plate is closed into a shell. It affects fit-up, welding preparation and the achievable diameter tolerance. The required method depends on the roll geometry, plate thickness, material strength and whether the application is a cylinder or cone.
Custom configurations can be assessed for wide or long plates, shipbuilding sections, wind-tower shells and heavy-wall vessels. Share the maximum plate size, lifting and foundation limits, target diameter and site power conditions; the engineering team will confirm feasibility before quotation.
Use the Request for Quote form and include the machine model or your technical requirements. You may also attach drawings or specifications where available. A sales engineer can then clarify the scope and prepare a project-specific quotation instead of quoting from a generic capacity label.
Lead time depends on machine size, custom engineering, component availability, inspection requirements, shipping method and the time needed to confirm technical specifications. Any delivery estimate should be treated as project-specific and confirmed in the formal quotation or order documents.
Payment structure and trade terms are confirmed for each order based on the quotation, destination, inspection scope and shipping arrangement. Common discussions may include T/T and FOB, but the final terms must come from the issued commercial documents rather than this general FAQ.
Installation guidance, commissioning support, operating instructions and training can be discussed as part of the project scope. The exact service method—remote or on-site—depends on destination, machine configuration and the agreed quotation.
Warranty coverage, response process and spare-parts arrangements are defined in the sales and service documents for the specific machine. Keep the machine model, serial information, photos and operating conditions ready when requesting technical support so the team can diagnose the issue efficiently.
Request a trial by sending the material grade, thickness, working width, target diameter and a drawing or sample requirement. A demonstration can then be scoped around the published model, available material and agreed inspection points rather than an unverified generic test.
Packaging and shipping are confirmed against machine dimensions, weight, lifting points, destination and agreed trade terms. For an oversized machine, provide the site unloading plan and port information so the quotation can identify the suitable transport arrangement.
Tooling can be reviewed against material grade, thickness, minimum diameter, cone angle and production volume. Provide the part drawing and tolerance target; the engineering team will confirm whether the requested roll diameter, support or accessory fits the proposed machine.