Exhaust systems are one of the highest-volume tube bending jobs in the automotive world, and they are less forgiving than they look. Thin-wall aluminised and stainless exhaust steel has to be bent cleanly, to exact angles, thousands of times over. This guide covers what makes a good exhaust pipe bender — or exhaust pipe bending machine — and how to match it to your production.
Why Exhaust Tube Needs Mandrel Bending
Exhaust tube is thin-wall to save weight, and a bend without mandrel support flattens the cross-section — which restricts gas flow and looks poor on a visible tailpipe. Mandrel bending holds the wall through the bend so the tube keeps its round section and full bore. It is the difference between a clean mandrel-bent exhaust and a crushed, restricted bend, and it is why a proper exhaust pipe bender always runs mandrel tooling. Every Dural Bend machine bends with mandrel, wiper die and pressure die as standard.
Which Machine for Exhaust?
For exhaust and tailpipe tube up to Ø170 mm, the Griffin hybrid CNC tube bender delivers the accuracy and repeatability exhaust fixtures demand, with the clamping power for heavier structural exhaust sections. For high-volume exhaust lines running the same part in the tens of thousands, the Atlas BRF automatic pipe bending machine runs feeding, rotation and bending hands-free — the cycle-time advantage pays back fast. For series work at a lower investment, the Atlas BR semi-automatic adds servo rotation for repeatable multi-plane exhaust bends.
End Forming for Exhaust Joints
Exhaust tube ends usually need forming to slip together or mate with flanges — expanding, reducing or beading. The Vulcan tube end forming machine handles these with the right number of stations for the part, and cut ends are chamfered clean for welding on the Bora chamfering machines.
Built for Automotive Volume
Exhaust bending lives in the automotive industry, where tight tolerances meet high volume. Dural Bend machines handle aluminised and stainless exhaust steel with tooling configured for the exact wall thickness. Send us your part drawing or a sample and we will recommend the configuration. Email info@duralbend.com or call +90 212 482 41 07.