Four-Roll Plate Bending Machine: Pinch, Pre-Bend and Roll in One Setup, with Options Built Around Your Work

The best plate bending machine is the one that makes a perfect part without extra handling. The SBFM Four-Roll Plate Bending Machine, a hydraulic roll bender with four cylinders and the code 4R SBS, is built around that idea. It bends thin or thick sheet metal into full circles, half circles, cones and radius shapes at the grade you need. A choice of optional features then lets you tune the machine to the way your shop actually works.

Quick Product Facts

• Product: Four-Roll Plate Bending Machine, Hydraulic
• Product code: 4R SBS
• Manufacturer: SBFM Machinery, Konya, Türkiye
• Category: Sheet Metal Forming
• Process: Hydraulic roll bending into full circles, half circles, cones and radii
• Roll arrangement: Four rolls: top, bottom and two side rolls
• Optional features: Digital display, NC control system, lift and side supporting arms

What Is a Four-Roll Plate Bending Machine?

A four-roll plate bending machine has an upper roll, a lower roll and two side rolls. The upper and lower rolls grip the plate and drive it, while hydraulic cylinders raise and lower the side rolls to set the curve. Each roll can be positioned on its own.

This arrangement turns a multi-step job into a single continuous process: squaring the plate, pre-bending both ends, rolling the body and closing the cylinder.

Why Four Rolls Beat Three on Accuracy

Because the plate stays gripped between the upper and lower rolls, it cannot slip or wander, and it stays square to the roll axis from the first pass. The side rolls then bend each end in turn, so the flat sections left by simpler machines are kept to a minimum. The same four-roll movement also forms cones and radius shapes.

Key Features and Benefits

• Four-roll design with pinch action for square, non-slip feeding
• Hydraulic roll movement that is strong, smooth and individually adjustable
• Pre-bending of both ends without turning the plate or using a press
• Circles, half circles, cones and radii on one machine
• Thin and thick sheet capability within the model capacity
• Rigid welded body that keeps accuracy under heavy load
• Modular options so the machine matches your production

Optional Features for Every Level of Production

A digital display shows roll positions clearly, so settings are easy to read and repeat. An NC control system stores bending data and adds automation and consistency to repeat parts. Side supporting arms hold wide or large-diameter plates so they do not sag or twist, and a lift helps with heavy workpieces. Please confirm which options are available for your model.

Materials You Can Bend

The machine rolls carbon steel, stainless steel, aluminum and other bendable plate materials. Maximum thickness and width depend on the model and on the yield strength of the material, and harder grades reduce the thickness you can roll.

Applications

• Pressure vessels, boilers and storage tanks
• Wind tower sections and steel structures
• Large pipes and cylinders made from rolled plate
• Shipbuilding and heavy fabrication
• Silos, hoppers, chimneys and ducting
• HVAC, food and chemical process equipment

Tips for Perfect Rolling

Keep the plate square to the roll axis and make sure it moves with the rolls without sliding. Allow for springback by rolling slightly past the target and checking with a template. On thick plate, form the radius gradually over several passes instead of in one, and never raise the lower or side rolls while the plate is bending.

Part of a Complete Sheet Metal Forming Range

SBFM Machinery has built sheet metal forming machines in Konya since 1998. Alongside four-roll machines, our range includes two-roll and three-roll plate bending machines, hydraulic dishing presses, flanging machines, profile and pipe bending machines, polishing machines for dished heads and special corrugated and grooved rolls. A single partner can equip your workshop from shells to tank heads, rings and pipes.

Why Choose SBFM Machinery?

Machines are designed, cut, welded, machined, assembled and tested in our own facilities, and our quality policy rests on customer satisfaction. We believe we grow together with our customers, so we listen first and recommend the model that fits your work, not simply the largest one. Technical guidance and spare parts help keep your machine productive for years.

How to Choose the Right Machine

• Maximum plate thickness, width and material grade
• Smallest cylinder diameter and the cones you need
• Whether you want NC control, digital display, lift or side arms
• Production volume and operator skill level
• Available floor space and power supply

Maintenance for Long Service Life

Fill the hydraulic tank with the recommended oil, change it at the intervals in the manual and clean the filters regularly. Keep the rolls clean, lubricate bearings and axle pins as instructed, and inspect hoses, fittings and electrical connections.

Frequently Asked Questions

What can the machine do? It bends thin and thick sheet metal into full circles, half circles, cones and radius shapes.

Does it need a separate pre-bending step? No. The side rolls pre-bend both ends in the same setup while the plate stays gripped.

How do I choose the capacity? Send us your plate thickness, width, material and smallest diameter, and our engineers will recommend the right model.

Request a Quote on MachineWorld.biz

Ready to roll with confidence? Contact us at +90 542 479 69 00 or export@MachineWorld.biz, or explore SBFM machines on MachineWorld.biz and request your quote today.

Precise rolling. Reliable production. Request a quote today.

It is used to bend thin or thick sheet metals as full circle, half circle, conical or radius with desired grade.