Skip to content

PBH Section Bending Machine

PBH Section Bender: Double-pinch, Up to 9 Drive Units, and 3D Bend Guide Rolls Offer Infinite Bending Possibilities for Profiles & Pipes of any Size.

What is
Section Bending Machine?

The section bending machine is used to rolling all types of materials and section shapes, rolling mild steel, stainless steel, aluminum, titanium, bronze, brass, copper, and other alloys. For special bending applications, BIT offers different unique section rolling solutions beyond standard PBH section bending machines so that almost any physically possible bending problem can be solved.

The combination molds equipped with the PBH section rolling machine can cold bend and roll angle iron (angle bending machine), flat bars, square bars, square & rectangular tubes, round & square rods, channels, I & H beams(Y-Y axis), and T-bars. Optional tooling allows for the bending of  I & H beams(X-X axis), round tube & pipe, oval tube, roll-formed shapes, aluminum extrusions, and special profiles.
Section Bending Machine is named as Profile Bending Machine, Section Rolling Machine, Angle Bending Machine, Angle Roll Machine, Angle Roller, or Section Bending Machinery.


Depending on the customer`s request, we can offer to customize a variety of profile bending machines for different configurations, depending on the application. Click here to download the product description.

Section Bending Machine at BIT offers PBH series for 10 standard CNC section bending machinery, special designs allow sections bending of materials with even bigger yield strength.
PBH Section Rolling Machine allows the bending/rolling of the biggest commercially available beams over their X-X Axi(hard way)s and Y-Y Axis(easy way) as well as tubes up to Φ510×20mm and flat bars up to 650×100mm(easy way bending)/300×80mm(hard way bending).

Mold Dia: Φ 260 mm.

Mold Dia: Φ 350 mm.

Mold Dia: Φ 385 mm.

Mold Dia: Φ 460 mm.

Mold Dia: Φ 520 mm.

Mold Dia: Φ 520 mm.

Mold Dia: Φ 600 mm.

Mold Dia: Φ 650 mm.

Mold Dia: Φ 700 mm.

Mold Dia: Φ800 mm.

PBH 4-Roll Hydraulic Section Bender

The 4-roll bending machine range offers a wider distance between the side rolls allowing wider bending radiuses. At the same time offers the possibility for pre-bending with extremely short remaining straight ends.

4-roll Profile Bending Machine
4-roll Profile Bending Machine
4-roll profile bending machine

Notes: Please refer to the following our page for the user manual: User Manual

PBH 4-Roll Section Bending Machine

PBH Section Rolling Machine

PBH section bending machine excels with robust frames, large shaft sizes, durable bearings, and high drive torque, ensuring unmatched performance and durability compared to competitors.

BIT’s PBH Section Bending Machine is designed specifically for the high-sectional modulus bending process, features innovative design elements aimed at enhancing performance and precision:

  • Monoblock robust frames reduce twists and deformation, stress relief enhances stability, and 5-axis CNC machining ensures precision and longevity.
  • Chrome-nickel alloy steel shafts reduce deflection, ensuring precision bending, running on self-lubricating spherical roller bearings.
  • The PBH machines feature a high torque driven by 3-roll rotation, enabling efficient bending with fewer steps, and making it possible to make a high-sectional modulus bending process a reality.
  • The bottom two rolls of the PBH section rolling machine can move independently of each other, permitting bending symmetrically and asymmetrically and providing the opportunity to perform the pre-bending process on both edges.

BIT uses world-renowned manufacturing standards and unmatched competence to produce the most powerful PBH machines with the highest section bending power on the market.

Section Bending Machine

Uses of
Section Bending Machine

BIT’s R & D department has designed a wide range of tooling and accessories: Bending H&I beams on the hard way-bending, “V” shape channel forming and bending for mine application, half pipes forming and rolling, and a great variety of special bending applications in order to increase productivity and quality of the finished for special materials.

PBH section bending machines are indispensable tools across various industries, offering versatile bending solutions for metal profiles, tubes, and sections. Their applications span a wide range of sectors:

In agriculture, they bend tongue tubes, loader arms, and equipment frames. For energy and communication purposes, they shape wind tower flanges, solar panel supports, and antenna housings. Industries utilize them for bending angles, molds, ductwork, and tank components. In rail cars and mining, they bend ribs, chutes, conveyors, and forklifts. Construction and HVAC sectors benefit from bending roofs, trusses, ductwork, and chillers. The military utilizes them for bending tank hangers and channels. Additionally, they shape playground equipment like steel sculptures, light fixtures, and basketball supports.

Specialty Section Bending Applications: Multi-Radius Rolling MachineScrew Bending MachineHelical Bending MachineReverse Curve Bending Machine, Busbar Bending Machine, Aluminum Pipe Bending Machine, 3D Pipe Bending Machine, Flange Rolling Machine, Aluminium Channel Bending Machine, Wind Tower Bending Machine, Letter Bending Machine, Roll Bending Machine, Ship Frame Bending Machine, Cambering Machine

Combination Bending Mold and Hydraulic 3D Guide Rolls of Section Bending Machine
Combination Bending Mold and Hydraulic 3D Guide Rolls

Advantages of
PBH Section Bending Machine

PBH Double Pinch Section Bending Machine customizes bent profiles from various metals, to reduce costs and minimize tangent/trim. (Pre-bending function with the PBH minimizes the straight tangent flat often required with other machines, saving time and materials.)

In China, BIT’s Profile Bending Machine in standard configuration is delivered with a package of features that usually are not available in the other machine:

  • Three Power Rotation Rolls and Double-Pinch: PBH section benders come with three power rotation rolls, guaranteeing maximum bending torque and automatic speed compensation. The double-pinch feature on lower rolls allows the pre-bending of both the leading and trailing ends of the profile directly on the machine, reducing scrap at segment beginnings and ends.
  • Boasts the Market’s Strongest Full-Frame Design: PBH section bending machines feature robust, spacious structures made from heavy-gauge steel plates, ensuring reliability. Frames are reinforced to minimize deformation, with stress relief after welding ensuring precision and longevity.
  • Combination Bending Molds for any Profiles: PBH section benders come with versatile bending combination molds, facilitating easy bending of various profiles including flat bars, square bars, tees, channels, round bars, square & rectangular tubes, and angles. These universal molds offer practical solutions for diverse bending needs.
  • Efficient Bending Control Hydraulic 3D Guide Rolls: Hydraulic 3D guide rolls on PBH benders work closely with bending rolls, adjustable in 6 directions for optimal control of planarity, diameter calibration, and asymmetrical section twisting prevention, and force the profile to create a spiral if needed. Equipped with angle leg-in bending tooling/cam rollers, aiding in diameter calibration or recovery. Notes: 3D guide rolls with cam rollers for correcting inherent twists when rolling angle leg-in bending, they aid in diameter calibration or recovery.

The following is an example of the PBH series: Heavy-Duty Double Pinch Section Bending Machine all come standard with 8 sets(up to 9 sets) of oil cylinder drives; Standard equipment combination molds can finish processing many standard metal profiles; Low energy consumption – energy saving, lower power than other machines on the market with the same bending capacity.

How it Works

Regardless of your needs and budget for a section bending machine, choosing BIT ensures you benefit from our commitment to quality and integrity in every detail of PBH section bending machines.

PBH section bending machines with a driven-by 3-roll rotation system, makes bending easier and prevents marks on the material, particularly when bending round or square pipes. This design offers superior flexibility, allowing for optimal performance.

The working phases of a section bending machine include loading, roll movement to achieve pinching, the working phase involving pressure increase and profile deformation, and unloading. The machine’s working principle significantly influences these phases, particularly loading and pinching, where adequate roll movement is crucial. This principle ensures efficient loading, secure pinching, precise deformation, and seamless unloading of the bent profiles.

PBH Section Bending Machine
Structural Feature

At BIT, we prioritize precision, durability, and safety in PBH section rolling machines, ensuring they meet the highest standards in the industry.

PBH Series Section Bending Machines are small in size, compact and reasonable in structure, reliable in performance, and convenient in operation and maintenance.

  • Specifically designed for the mass section bending process, featuring a PLC control system that records the position of the rollers in each bend, allowing for easy repetition of operations.
  • PBH section bending machines offer the flexibility to be positioned both vertically and horizontally, accommodating different bending requirements. Working in a vertical position is recommended for smaller-diameter pieces, while larger diameters are better suited for horizontal positioning to prevent the weight of the piece from affecting the results.
  • Self-aligning roller bearings reduce friction, enhancing efficiency, while trackless movement in the pivoting arm minimizes wear.
  • The mold of PBH section bender, forged from 42CrMo and quenched to HB235~270, offers exceptional mechanical properties, strength, and wear resistance, ideal for heavy-duty applications with a prolonged lifespan.
  • An independent mobile operation table or Bluetooth remote control operation ensures operator safety and ease of use.
  • PBH machines are optional equipped with state-of-the-art 5.5 technology, and with remote connectivity, manufacturers can perform software updates and detect anomalies in the machine without the need for onsite visits.

Read More: Revolutionizing Profilg Bending with PBH Series Section Bending Machines

Metal Section
Available for Bending

Notes: Regarding Max Bending Capacity, the parameters marked below are standard machine parameters and machines with higher Bending Capacity can be customized.
You can also learn more by visiting the PBH standard machine parameter table.

With section roll bending, the mold combination determines the effective radius and a steel section/profile’s standard sizes and yield strength. Depending on your steel section choice, the effective radius (the internal radius after bending) may be smaller for a larger the size gauge, or vice versa. Our effective bend radii are listed on Metal Section Bending Capacity Calculator page.

Flat Bar
PBH 300 Bending & Rolling the Flate Bar

Flat bars are versatile in tank stiffeners, flanges, and lintels. They bend easily in round, square, or rectangular shapes along the “easy way” (y-y axis), forming a belt-like shape. Bending flat bars the “hard way” (x-x axis) is more challenging, resembling a large flange. The PBH section bending machine adeptly handles bar bending, meeting precise radii requirements without distortion. Our goal is to minimize scrap and waste, helping clients economize amid rising metal prices. Learn More

Square Steel Bar

Max Bending Capacity: 240×240 (mm)

PBH 200 Bending & Rolling the Flate Bar

Bent square bars serve various purposes like trummel screen rings, architectural features, and artistic works. Often, square bars are machined post-bending as a cost-effective alternative to shaping from plates. Bar rolling yields more usable material with less scrap, reducing material costs. PBH Section Bender excels in bending bars, handling relatively thin and wide bars to tight radii with minimal distortion. It accommodates hot rolled, stainless, aluminum, Inconel, brass, copper, and other alloy bars effectively. Learn More

circular pipe

Max Bending Capacity: 510×20 (mm)

PBH 360 Roll Bending the Circular Pipe

Pipe/CHS (Circular Hollow Section) is a widely used choice for structural and architectural projects. Round tube bending finds diverse industrial applications, from manufacturing pipeline equipment to creating architectural, structural, HVAC components, and beyond. The PBH section bending machine collaborates with clients to identify the optimal anti-distortion solution for custom pipe bending projects. Learn More

square tube

Max Bending Capacity: 350×350×12 (mm)

PBH 200 Section Rolling Machine for Tubing Bend

Custom tube bending with PBH Section Rolling Machine ensures precise adaptation of metal tubing to project specs. Force aligns tube with die. Rollers and mandrels aid curve creation, prevent collapse. PBH specializes in bending square and rectangular hollow sections for structural projects. Handles tubes of any size, ensuring tight tolerances. Results are uniform, predictable, error-free, even for complex x-x axis modifications. Learn More

Unequal Angle Iron

Max Bending Capacity: 200×200×30 (mm)

PBH 200 Bending & Rolling the Angle Iron

Angles serve diverse purposes in tank stiffeners, flanges, lintels, handrails, and roof trusses. PBH Section Bending Machine produces rolled angle rings bent off-axis, with multiple radii, helically, or into compound bends. Leg-out rings resemble straw hats; heel-in rings function as pulleys. The most challenging angle bending orientation is leg in, which, if not executed correctly, may cause distortion. Learn More

Channel UPN

Max Bending Capacity: UPN 700

PBH 360 4-Rolls Bending & Rolling the Channel UPN

Channels are integral in tank stiffeners, supports, roof beams, circular platforms, and trusses. PBH Section Bending Machines excel at bending challenging sections to tight radii with minimal distortion and achieve precision in steel and aluminum channel bending, including off-axis, helical, multi-radius bends, and rolling channels with flanges in or out, or bending along the x-x axis. Learn More

Beam IPN

Max Bending Capacity: IPE 500/Hard-Way

PBH 360 Bending & Rolling the Beam IPE 200

Beams are crucial in tank supports, roof beams, bridge beams, cambered beams, tunnel supports, curved lifting beams (horizontal and vertical), and circular platforms. Two main bending methods are the “easy way” and “hard way.” PBH Section Bending Machine excels in both, ensuring timely completion of even the most challenging projects while meeting industry guidelines. Learn More


Max Bending Capacity: IPE 700/Easy-Way

PBH 360 4-Rolls Rolling the Beam HEB/IPB

Curving steel beams like HEB/IPB for industry involves beam bending. PBH Section Bending Machine offers cost-effective solutions for modifying metal beams, with expedited timelines. Beam bending shapes steel beams using significant force and specialized tooling dies. PBH Section Bender ensures precise curvature to your specifications, minimizing distortion. Learn More

Mining Support Steel Bending With PBH 300

Underground mines and tunnels face variable compressive strata conditions, demanding resilient support methods for safety.
PBH Section Bending Machine provides specialized bending for Mining U-Shape Steel Roof Support Beams, ensuring suitability for roadways and tunnels. Learn More:

Limpet Coil/Half-Pipe Roll-Forming and Roll-Bending With PBH 300

Limpet coil, commonly known as half-pipe, is ideal for high-pressure fluid heat transfer in chemical plants, reactors, heat exchangers, pressure vessels, and distillation columns. PBH section bending machine forming and rolling the steel profile of the coil into a Limpet Coil/Half Pipe, adjusting size and shape while bending it to match the tank diameter. Learn More

Minimum Bending Radii
and Tolerances

Common Terminology of Profile Bending

The minimum bending radius for a section depends on its properties and bending methods. Advancements in techniques have reduced these minimum radii over time. Normal tolerances for single radius bends adhere to national specifications, while complexities warrant specialist consultation.
Generally, sections can be bent to single or multi-radius curves, parabolic or elliptical shapes, or even co-ordinates. However, physical constraints limit three-dimensional curvature. Thus, detailed discussion during inquiry stages is crucial for complex bending requirements.

The radius of a bend is the most critical piece of information required to curve a steel structure. The radius requirement dictates the bending process used. See also Bend Radius Calculator

MS Section Bender

MS 50 series Section Benders (profile bending machine, Angle Iron Roller)is a small manual hydraulic section bending machine.
Its volume and weight are very small, and of course, its bending ability is also very small. No ability to bend channel and H&I beam profiles.

  • MSE-50: The movable upper roller can move up and down by adjusting the height of the screw manually;
  • MSH-50: The movable upper roller can move up and down by adjusting the height of the hydraulic cylinder;

We’ve covered everything you need to know about the PBH section bending machine from BIT. You should also check out our Profile Bending Process page.