FAQs

When the bend is at the limit of standard machines: tight ID for the section, heavy bar, exotic material, large-diameter pressure vessel rings, square or rectangular sections, or production volumes that demand short flat ends and consistent geometry. A tailored machine sizes the side-roll force, drive torque and tooling to the exact application, which means

Both the ring bending and the spiraling work are hands-on processes. The operator reads the bar, walks around the machine, and adjusts pitch and roll position on the fly. A CNC system adds programming overhead and a fixed control station, which slows the workflow and limits visibility. A wireless Control Unit lets the operator stay

A spiraling machine is a section bending machine configured with special rolls and a hydraulic pitch unit so that the workpiece advances along its own axis as it bends, producing a helix rather than a flat ring. Standard section benders only roll in plane. Spiraling needs both the lift/pitch motion and the bending force to

Yes, provided the base machine is sized for the harder of the two jobs and the tooling can be swapped for the application. As an example, the SweBend SB3X-140 is used day-to-day for bending large support rings on pressure vessels, and the same machine spirals 100 x 30 mm S355 flat bar to ID 500

Square and rectangular sections deform very differently from round bar. The corners want to lift and the section wants to twist out of plane. Special rolls grip the section flats and constrain the corners through the bend, which keeps the bar in plane and prevents corner cracking. Without dedicated tooling you get scrap and inconsistent

Capacity depends on machine configuration and the groove geometry of the forming rolls. Heavy-duty joggling machines like the JM-140 typically handle mild steel up to 15 mm thick, with cylinder diameters ranging from around 1,000 mm to 5,000 mm. Harder materials or tighter grooves may reduce the maximum thickness.

A dedicated joggling machine is the right choice when production involves repeated cylinder end forming, when plate thickness exceeds what manual methods can reliably handle, or when tolerance consistency across batches is critical. The investment pays back through reduced scrap, faster cycle times, and eliminated rework. Machines with interchangeable forming rolls also adapt as new

In metal forming, a joggle is a stepped offset that lets two plates or cylinder sections overlap while the outer surface stays flush. The most common industrial use is in pressure vessel and tank construction, where joggled cylinder ends create a consistent lap joint for welding. Because the shape must be uniform around the part,

Joggling is a metal-forming process that creates a stepped offset at the end of a cylinder or sheet so two pieces can overlap and sit flush at a joint. In heavy industrial work it is used to form the flanged ends of pressure vessel cylinders before welding. The offset has to be uniform across the

A joggling machine forms a stepped offset at the end of a cylinder or plate by pressing the material between two profiled rolls. The cylinder rotates while the rolls apply controlled force, producing a consistent step geometry around the full circumference. The process is used in pressure vessel, tank, and process equipment manufacturing to prepare