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Helical Spiral Bending Machine

Helical bending is available in a variety of metals and alloys, from steel and titanium to exotic materials. It can accurately bend heavy plate and structural sections into 3D shapes or helical profiles for architectural structures and feature steelwork on a wide variety of major structural projects. No matter how complex, you can send us spiral bending process drawings in various formats for the design, selection, and manufacture of helical bending machines.

PBH Section Bending Machine

The 3D guide roller of the PBH section bending machine can be adjusted from three directions of X, Y and Z axes to achieve helical/spiral bending.

PBA Helical Bending Machine

PBA Helical Bending Machine(PBA Aluminum Bending Machine) uses rollers that match the section of the profile and uses the principle of three points to form a circle. It automatically controls the displacement (Y-axis direction) of the middle roller (pressure roller), allowing the profile to be bent or formed at one time between three sets of rollers. Bending and forming multiple times (X-axis direction) to the required radius; through the automatic lifting and lowering of the roller (Z-axis direction), the profile forms arcs of different curvatures in the Z-axis direction, thereby achieving the required helical spiral bending effect.

Helical Spiral Bending Machine

PFB Helical Spiral Bending Machine

Freeform bending involves creating complex and irregular shapes without relying on traditional straight-line or fixed-radius bending methods. When combined with helical spiral bending, it allows for the fabrication of three-dimensional, aesthetically unique structures.

Freeform bending machines often feature multi-axis control to manipulate the material in three-dimensional space. The machine may have the ability to control the movement of the material along the X, Y, and Z axes, allowing for a wide range of bending possibilities.

How to choose the right screw bending machine

PFB Helical Spiral Bending Machine

The PBS Screw Bending Machine is a cold bending equipment with various characteristics of a cold bending machine. It is mainly used to produce spiral blades of various types and specifications. Through the relative movement of two conical rollers, this equipment can extrude strip steel of different materials into continuous screw blades of various specifications and sizes. The screw bending machine equipment is equipped with a hydraulic cutting device, and customers can cut it into any length according to their needs for convenient use.

Helical Spiral Bending Basics

AISC Curved Member Design Guide Section 2.2.7: Using strict definitions, a spiral is a two-dimensional multi radius curve, and a helix is a three-dimensional curve with an arc in one plane and a constant slope in a perpendicular plane. However, the terms are often used interchangeably in construction. A helix is the curve formed by bending about an axis on the surface of a cylinder or cone while rising at a constant angle. This curving process is often called sloped rolling or pitched rolling. The lack of cross-sectional rotation along the member axis distinguishes spiral bending from off-axis bending.

PBA Profile Bending Machine for Helical Bending

Helical spiral bending, a sophisticated technique, transcends conventional steel bending practices. This method, applicable to various structural steel sections and plates, yields mesmerizing results resembling the coiled shape of a flat hose or the heating coil of a cooking range. Referred to as “pitched rolling” or “sloped rolling,” true helical bending finds application in crafting curved steel stair elements, handrails, and innovative helical transfer conveyors.

The Essence of Helical Spiral Bending

Defining the Spiral Bend: Helical spiral bending is distinct in its ability to shape steel into coils reminiscent of “pancake coils.” To grasp the concept, envision a hose coiled flat on the ground or the spiral design of a heating coil.

Applications in Steel Fabrication

Curved Stair Stringers and Handrails: Helical rolling finds a natural fit in crafting curved steel stair stringers and handrails. Stringer members undergo meticulous checks for radius, pitch, and plumb to facilitate ease of fabrication. Handrails, alternatively, can be rolled to an approximate flat radius, providing a cost-effective solution that may require field fitting.

helical spiral bending

Challenges and Solutions in Helical Bending

  • Pitch Considerations: Visualizing helical bending is akin to envisioning the top coil of a stove’s heating element. While diverse structural materials can undergo helical bending, certain materials and shapes exhibit varying degrees of ease. Pipes and tubing, in particular, have emerged as highly functional choices for applications demanding helical curves.
  • Precision in Bending: Rolling pipes into a helix demands meticulous attention to detail. Incorrect calculations of the helix’s pitch can result in final pieces that deviate from project expectations. At BIT, we recognize the complexities associated with helical bending and emphasize precision in our calculations to ensure the final result aligns seamlessly with project requirements.

Industry Expertise and Innovation

BIT’s Expertise: BIT boasts a team of industry experts well-versed in the nuances of helical bending. With a wealth of experience, we navigate the challenges inherent in this bending technique, ensuring our clients receive not only precision but also innovative solutions that push the boundaries of what is achievable in steel fabrication.


In conclusion, helical spiral bending transcends the ordinary, unlocking a realm of design possibilities in steel fabrication. From crafting intricate stair elements to overcoming challenges in precision bending, this technique stands as a testament to innovation and expertise. As industry leaders, BIT remains committed to pushing the boundaries of what is achievable, offering clients not just Helical Bending Machines but works of art forged through precision and imagination.