---
title: "Tube Bending Services | Custom Bent Tube & Pipe | OpenSpindle"
description: "Get quotes for custom bent tube and pipe from independent machine shops. Rotary draw, mandrel, roll, and press bending in metal round and square stock. Upload a drawing."
canonical: https://openspindle.com/capabilities/tube-bending
---

# Tube and pipe bending from independent machine shops

Round, square, and pipe stock formed to a specified radius and bend sequence, with mandrel support for thin walls and roll bending for large sweeps. Upload a drawing and hear back from shops set up for bending.

## Tube bending shops on OpenSpindle

Real shops that bend custom tube and pipe. See their equipment and talk to the person making your part.

[Browse all tube bending shops](https://openspindle.com/manufacturers?capability=Tube%20bending)

## Tube and pipe our bending shops run

Bending starts from tube or pipe stock, supplied round or square. Common alloys are below; if yours is not here, ask when you request a quote.

- [Aluminum](https://openspindle.com/materials/aluminum.md) -- 6061 · 6063
- [Stainless steel](https://openspindle.com/materials/stainless-steel.md) -- 304 · 316
- [Carbon steel](https://openspindle.com/materials/carbon-steel.md) -- 1010 · DOM
- [Copper](https://openspindle.com/materials/copper.md) -- C122
- [Brass](https://openspindle.com/materials/brass.md) -- C260 · C360
- [Titanium](https://openspindle.com/materials/titanium.md) -- Grade 2 · Grade 5

## Tolerances

| Feature | With drawing | No callout |
| --- | --- | --- |
| Bend angle | ±0.5 to ±1° | ISO 2768 Coarse |
| Bend radius (CLR) | ±0.030 in | Tooling-dependent |
| End-to-end length | ±0.030 in | ISO 2768 Coarse |
| Plane-of-bend rotation | ±1° | ±2° typical |

Springback means the tube relaxes open after the die releases, so shops overbend to hit the drawing angle. Achievable radius is set by the bend tooling on hand; call out center-line radius (CLR) and wall thickness and the shop confirms it can be bent without a new die.

## Threads, Inserts & Finishing

End-forming (flares, beads, expansions, and reductions), notching and coping for weld joints, hole punching, and welding bent tubes into finished assemblies as a secondary op.

Applied after bending. Bare ships fastest; passivation, anodize, plating, and powder coating are common on bent metal parts.

| Finish | Materials | Adds | Stacks with |
| --- | --- | --- | --- |
| As-bent | All | +0 days | Anything |
| Passivation | Stainless only | +2 days | Bead blast |
| Anodize | Aluminum, titanium | +3-5 days | Bead blast |
| Powder coat | Steel, aluminum | +3-5 days | After welding |

Bend first, then weld, then finish. Coating a welded assembly hides weld discoloration and gives one uniform surface, so plan the sequence before you order.

## What Makes a Good RFQ

| Instead of | Send |
| --- | --- |
| "Bent tube, need a quote" | "6061 tube, ⌀1.0 x 0.065 wall, three bends at 90°, 4.0 in CLR, qty 50" |
| "Tight bend on the end" | "90° bend, 2x diameter CLR, mandrel-bent to hold the wall, no wrinkles" |
| "Weld the ends together" | "Notch and TIG weld into a closed loop per drawing, weld ground flush" |

Give the center-line radius, wall thickness, and the straight length between bends. That is what decides whether it needs a mandrel and what it costs.

## Industries Served

- Aerospace
- Automotive
- Furniture & fixtures
- HVAC & process piping
- Handrails & architectural
- Agriculture
- Robotics
- Industrial / OEM

Tube bending shops on OpenSpindle produce frames, roll cages, exhaust, handrails, and fluid lines for demanding industries, including AS9100 and ITAR-registered shops.

## Frequently Asked Questions

### What is the difference between rotary draw and roll bending?

Rotary draw bending pulls the tube around a fixed radius die for tight, accurate, repeatable bends, and is the default for most tube work. Roll (ring) bending feeds the tube through three rolls to form large sweeping radii like coils and arcs. Note the radius you need and shops pick the right method.

### When do I need a mandrel bend?

A mandrel supports the tube from the inside so a thin wall does not collapse or wrinkle on a tight radius. Thin walls (roughly under 0.065 in) and radii below about 3x the diameter usually need one. Thicker walls and larger radii bend fine without it, which is cheaper.

### How tight a radius can you bend?

It depends on diameter and wall. A common rule is a center-line radius of about 2x to 3x the tube diameter; tighter than that needs a mandrel and matched tooling. Give the CLR and wall thickness on your drawing and the shop confirms it can be bent without new dies.

### What is springback and how is it handled?

After the die releases, the tube relaxes and opens slightly, more in high-strength alloys. Shops overbend by a known amount to land on the target angle. You do not design for it; just tolerance the finished angle.

### Can you bend square and rectangular tube?

Yes. Square and rectangular sections bend on the same rotary draw machines with section-specific dies, though they are more prone to wall distortion, so a mandrel or wiper die is used on tight radii.

### Can bent tubes be welded into an assembly?

Yes. Most shops notch, cope, and weld bent tubes into frames, loops, and fabrications in-house. Send the assembly drawing and note weld finish, then finish or coat after welding.

### What file formats should I send?

STEP, IGES, X_T, DWG, DXF, or a dimensioned PDF. Include material, tube diameter and wall, the CLR, each bend angle, straight lengths, quantity, and any end-forming or finish.

## Other Capabilities

- [Sheet Metal & Press Brake](https://openspindle.com/capabilities/sheet-metal-fabrication.md)
- [Welding](https://openspindle.com/capabilities/welding.md)
- [Laser Cutting](https://openspindle.com/capabilities/laser-cutting.md)
- [CNC Machining](https://openspindle.com/capabilities/cnc-machining.md)
- [CNC Turning](https://openspindle.com/capabilities/cnc-turning.md)
- [Powder Coating](https://openspindle.com/manufacturers?capability=Powder%20coating)

## Design Notes That Move Your Price

Not a definition of bending. The design choices that move your price and lead time.

- **Radius is set by tooling:** A bend needs a die at that exact radius. Design to a radius the shop already owns (ask, or match a common 2x to 3x diameter CLR) and you skip the cost of a new die.
- **Leave straight between bends:** The machine needs to grip the tube between bends. Too little straight, roughly under one diameter, and the clamp cannot hold it, forcing a hand fixture or a redesign.
- **Thin walls want a mandrel:** A thin wall on a tight radius collapses or wrinkles without inside support. Either add wall thickness, open the radius, or accept the mandrel setup cost. Say which you prefer.
- **Bend before you machine:** Bending moves material and springs back, so precision holes and mating faces added before the bend will shift. Put close-tolerance features on straight sections machined after bending.

## Get tube bending quotes

Upload a drawing once and compare quotes from independent tube bending shops.