Large diameter carbon fiber tubes are strong composite parts. They design tough structures and meet lightweight needs.
1. Product Types
You can classify large diameter carbon fiber tubes by their cross-section shape:
Large diameter carbon fiber round tubes are often used for:
Structural supports
Rotating shafts
Lightweight frames
They offer high torsional stiffness and compressive strength.
Large carbon fiber square tubes are ideal for structures that must have flat mounts or easy connections. They’re perfect for robotic arms and equipment frames, making fixing and assembly simple.
Engineers use large diameter carbon fiber rectangular tubes for special structures. They serve as beams, guide rails, and platform supports. These tubes offer excellent bending resistance.
You can ask for other custom profiles. These include oval or elliptical tubes, hexagonal tubes, and conical or tapered tubes.
2. Product Advantages
Lightweight and strong: Its density is about 1/5 that of steel, but its tensile strength can be 8–10 times greater. This greatly cuts down on structural weight.
Great corrosion resistance: This non-metal material stands up to acids, alkalis, salt spray, and atmospheric corrosion. It’s ideal for tough environments.
Good dimensional stability.
Low thermal expansion means it will not easily deform with temperature changes.
**Fatigue and creep resistance:** Enjoy a long service life with little permanent deformation. Its lifespan often surpasses that of metal tubes in many applications.
Premium look: Surfaces can be plain weave, twill, matte, or glossy.
You can also paint or finish them for a high-end feel.
3. Application Areas
Large diameter carbon fiber tubes are widely used across industries, including:
Aerospace: wing structures, satellite frames, UAV fuselages, and boom tubes.
Industrial equipment: robotic arms, idler rolls, drive shafts, and equipment skeletons.
Medical devices: surgical bed frames, medical bed rails, rehabilitation device structural parts.
Sports: sailboat masts, ski poles, golf shafts, and arrow shafts.
Transportation: automotive drive shafts, rail transit structural components.
Architecture & decor: curtain wall frameworks, decorative columns, exhibition structures.
4. Product Characteristics (Technical Table)
| Property | Range / Description |
|---|---|
| Materials | Toray (Japan) T300 / T700 / T800; domestic high-strength carbon fibers |
| Resin System | Epoxy resin (room-temperature / high-temperature curing); thermoplastic matrix can be customized |
| Density | ~1.6–1.8 g/cm³ |
| Tensile Strength | Up to > 3000 MPa |
| Flexural Strength | Higher than steel; specific values depend on ply/stacking design |
| Operating Temperature | −60°C to +180°C (special resins available for higher temperatures) |
| Surface Finish | Plain weave / twill; matte / glossy; can be painted or printed with logo |
| Color | Standard black; colored surfaces available on request |
5. Dimensions & Tolerances (Customizable)
| Type | Outer Diameter / Outer Dimension | Wall Thickness | Max Length |
|---|---|---|---|
| Round tube | 10–800 mm OD | 0.5–40 mm | ≤ 6.5 m |
| Square tube | Side 10–500 mm | 1–30 mm | ≤ 6 m |
| Rectangular tube | Long side ≤ 600 mm | 1–30 mm | ≤ 6 m |
Dimension tolerance: ±0.1 to ±0.5 mm (depends on size & process requirements). Special shapes — tapered, curved, drilled, threaded, etc. — are all manufacturable to order.
6. Packaging & Transportation
Packaging:
Inner layer: pearl foam or bubble wrap to prevent scratching.
Middle: reinforced cardboard or wooden crate
Outer: woven bag or wooden crate suitable for long-distance transport
Transport:
Small quantity: express couriers (e.g., SF Express, Deppon)
Large quantity: dedicated logistics line, sea freight, or air freight.
Labeling: Product labels include the model, size, quantity, batch number, and production date. Customers can add a brand logo or barcode according to their requirements.
7. E-A-T — Expertise, Authoritativeness, Trustworthiness
Expertise:
Designed by a composite engineering team with over 10 years of experience.
Uses imported raw materials (Toray, Formosa) to ensure stable performance.
Support for customization through drawing, design of ply, and simulation of mechanical processes.
Authoritativeness:
Customers include aerospace, defense, and medical sector clients.
ISO 9001 Quality Management System certified.
Compliant with international environmental standards, such as RoHS and REACH.
Trustworthiness:
Material test reports and mechanical performance test data are available.
Third-party testing supported (e.g., SGS, CTI).
Complete after-sales and warranty support, with technical help.
8. Conclusion
Large diameter carbon fiber tubes are replacing metal parts in many high-end industries. They provide improved mechanics and are lighter. This makes them a top pick for today’s high-performance composites. We deliver high-quality, accurate, and reliable carbon fiber tube products and solutions. Customization from drawings or samples is welcome.
If you need samples or technical documents, contact our sales engineers. They provide one-on-one professional services.
