Multi-Bend 3D Geometry
A cage is many bends in a single tube on different planes; manual benders lose accuracy fast.
Roll Cage Tube Bending
Symmetrical, Wrinkle-Free Multi-Bend Cage Tube
As a roll cage tube bender, the Telhoo mandrel CNC bender forms roll cage and safety-structure tube in DOM and chrome-moly with tight, round radii and repeatable left-right symmetry.
Quick Answer
Roll cage tube bending forms the multi-bend, symmetrical tube structures used in motorsport and off-road vehicles. Telhoo mandrel CNC benders bend DOM and chrome-moly tube up to Φ89 mm with tight, wrinkle-free radii and repeatable left-right symmetry.
The Challenge
Why Roll Cage Bending Is Demanding
A cage is one of the hardest tube parts to bend well. These are the failure points Telhoo tooling is built to beat.
Left-Right Symmetry
Mirror-image members must match exactly or the cage won't fit the chassis.
Anti-Flatten & Wrinkle
Tight-radius bends on structural tube flatten or wrinkle without a mandrel and wiper die.
Tough Materials
DOM and 4130 chrome-moly need real force and the right bend speed to avoid cracking.
Notching & Fishmouth Joints
Tube ends need accurate cope cuts so intersecting members seat tight for strong, clean welds.
Repeatable Kits & Batches
Programmed bends reproduce every member, so a full cage kit fits the same on unit ten as on unit one.
How Telhoo Does It
How Telhoo Bends Cage-Grade Tube
Cage work suits our small-to-mid CNC benders with hydraulic moving-mandrel tooling: set up as a roll cage tube bender, the machine holds tight radii on structural tube and stores the full multi-bend program for repeatable, symmetrical members. That makes the CNC mandrel bender an efficient roll cage bender for both one-off cages and production runs.
For fully symmetrical assemblies, double head bending forms both ends in one cycle. The bending method itself is rotary draw with a mandrel — see the process pages for detail.
Capacity Range
Roll Cage Bending Range
DiameterΦ25–89 mm
Typical cage and structural tube
MaterialsDOM · 4130 · Steel
Chrome-moly and structural grades
RadiusTight CLR
Mandrel-supported round bends
Process Capability
Cage Bending Capability
The tooling and control that keep cage tube round, symmetrical and true.
Mandrel Anti-Flatten
Bore support prevents flattening on tight structural bends.
Tight Centre-Line Radius
Ball-mandrel tooling reaches low CLR without wrinkles.
Symmetric Repeatability
Stored CNC programs make left and right members identical.
Multi-Bend Programming
Sequences many 3D bends per tube with simulation.
Why Telhoo
A Pipe Processing Partner, Not Just A Machine
Jiangsu Telhoo has manufactured pipe bending machines for over 35 years and exports to buyers in more than 65 countries. Cage and structural fabricators rely on our mandrel CNC tooling for round, symmetrical, repeatable bends.
- In-house R&D, machining and assembly
- CE, ISO9001, UL and EAC certified
- Non-standard and OEM machines built to your line
Telhoo By The NumbersZhangjiagang, China
Experience
35+
Years manufacturing pipe processing machinery
Facility
30,000 m²
Modern production plant with in-house R&D
Export
65+
Countries served across five continents
Response
24 h
Typical reply time on your quotation
In Depth
How Telhoo Approaches Roll Cage Tube Bending
The tooling and process control behind round, symmetrical, repeatable cage tube.
A competition roll cage or safety structure is one continuous story of bends — main hoops, A-pillars, door bars and gussets — that must be symmetrical left to right and dimensionally repeatable so the finished cage drops onto the chassis. Telhoo bends this work on mandrel-equipped CNC benders that store the full multi-bend program, so the tenth cage matches the first.
Structural tube such as DOM and 4130 chrome-moly work-hardens and springs back more than mild steel, and tight centre-line radii tend to flatten on the outside and wrinkle on the inside. A moving mandrel supports the bore through the bend while a wiper die controls the inside radius, keeping the section round and the wall consistent — critical where the tube is a load path, not decoration.
Roll Cage Bending, Handled End To End
- Bar bending Φ25–89 mm in DOM, chrome-moly and mild steel
- Tight centre-line radii with mandrel and wiper die
- Mirror-image left and right members from one stored program
- Plain or coped tube ends ready for welding
- Prototype single cages through to batch runs
Send your cage drawing or bend list with the tube outside diameter, wall thickness and material, and our engineers confirm tooling and radius feasibility before you commit to production.
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A 115NC hydraulic bender delivered wrinkle-free forming on thick-walled tube.
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All Cases
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Quote My Roll Cage Bending
Send your cage drawing and tube spec and we will confirm the right CNC bender, tooling and a quote.
- 1Send Your Drawing
Share your part drawing, tube size, material and quantity.
- 2Engineering Review
We confirm feasibility, tooling, layout and the right machine configuration.
- 3Tailored Quote In 24h
You receive a machine and tooling quotation, usually within one working day.
FAQ
Common Questions About Roll Cage Tube Bending
Roll cage and safety-structure tube is typically Φ25–89 mm; Telhoo mandrel CNC benders cover this range with tight centre-line radii.
Yes. DOM and 4130 chrome-moly bend well with the correct mandrel, wiper die and bend speed. Send the outside diameter, wall thickness and radius and our engineers confirm the tooling.
CNC control stores the bend program, so mirror-image members repeat exactly, holding ±0.1° so both sides match.
A moving mandrel supports the bore and a wiper die controls the inside radius, giving round, wrinkle-free bends even at tight centre-line radius.
Our small and mid-size CNC mandrel benders are configured as a roll cage tube bender — the same rotary-draw mandrel bending used for exhaust and chassis tube, set up for DOM and chrome-moly cage tube. As a roll cage bender it stores each member’s multi-bend program so left and right sides repeat symmetrically.
Both. We manufacture the CNC benders and mandrel tooling; for machine enquiries see our CNC pipe bending machine range. For parts, send your cage drawing for a fabrication quote.
Custom fabrication and machines available
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Share your pipe drawing, material and quantity, and our engineers reply with a tailored quote within 24 hours.