Xinbo Composites manufactures roll-wrapped carbon fiber round tubes from 5mm to 500mm OD for OEM/ODM projects in the drone, robotics, aerospace, and industrial automation fields across 100+ countries. Carbon fiber tubes are customized according to customers’ drawings at Xinbo’s ISO 9001-certified factory in Weihai, with fiber grades, mechanical strengths, wall thickness, layup, and surface finish per application requirements.
Round carbon fiber tubing is the default structural profile for applications requiring high torsional stiffness, precision sliding fits, or rotating components. The round cross-section distributes bending and torsional loads evenly in all directions, making it a common choice in components such as drone arms, robotic arm segments, telescopic poles, and drive shafts. This page outlines Xinbo Composites’ standard size ranges and material selection for applications and tolerances.
Size Range for Roll-Wrapped Round Carbon Fiber Tubes
Xinbo’s roll-wrapped carbon fiber round tubes are produced at its ISO 9001-certified facility in Weihai using prepreg carbon fiber wrapped around a precision mandrel under high pressure and cured at 130℃. The result is a carbon fiber tube with consistent wall thickness, accurate outer diameter, and a clean surface finish on both the inside and outside. For a full breakdown of how the process works, see Xinbo’s published guide to the roll-wrapped carbon fiber tube manufacturing process.
The standard diameter range covers OD from 5mm to 500mm, with wall thickness from 0.6mm to 50mm. Raw tubes are produced to ±0.15mm OD tolerance. For applications requiring a precise sliding or rotating fit, including telescopic poles, bearing housings, and precision-machined joints, polished round tubes are produced to ±0.05mm OD tolerance. Fiber grade options include T300 standard modulus for general structural work, T700 for higher strength-to-weight requirements, and T800 or M40J high modulus for aerospace and highly stiff applications.
| Specification | Range / Options |
|---|---|
| Outer Diameter (OD) | 5mm – 500mm |
| Wall Thickness | 0.6mm – 50mm |
| Inner Diameter (ID) | Defined by OD and wall thickness, specify one or both on the drawing |
| Standard Lengths | 100mm ~ 5000mm; custom lengths |
| OD Tolerance — Raw | ±0.15mm |
| OD Tolerance — Polished | ±0.05mm |
| Fiber Grade | T300/T700 (Standard Modulus) T800/T1000 (Intermediate) , M35J/ M40 (High Modulus) |
| Weave Pattern | 3K Twill / Plain Weave / Unidirectional (UD) |
| Fiber Orientation | 0°/90° (standard) / 0°/±45°/90° (custom layup) |
| Surface Finish | Raw / Polished / Glossy Clear Coat / Matte Clear Coat |
Xinbo also manufactures tapered carbon fiber tubes and hexagonal carbon fiber tubes by the same roll-wrapping process.
Where Carbon Fiber Round Tubes Applications Are Specified
Carbon fiber round tubes are specified by engineers and procurement teams across many industries where a structure must carry bending or torsional loads at a lightweight. The round profile handles torsion particularly well compared to square or rectangular profiles of equal wall thickness. This makes it the default choice for rotating components, telescopic assemblies, and any application where the tube must slide inside a mating part.
For drones, round carbon fiber tubes with an outer diameter between 10 mm and 120 mm are standard for booms, as stiffness and impact resistance under propeller airflow are crucial. Delta robotic arms typically have an outer diameter of 12 mm to 20 mm and feature a painted finish to meet assembly tolerances. Telescopic camera poles and inspection poles utilize natural surfaces. For large-diameter structural applications exceeding 100 mm, such as antenna masts, industrial frames, and optical instrument housings, we provide natural, polished or painted finishes depending on applications.
| OEM Application | OD Range | Wall Thickness | Fiber Grade | Surface Finish |
|---|---|---|---|---|
| UAV / Drone Boom Arms | 10mm – 120mm | 1mm – 5mm | T700 | Natural or Matte Clear Coat |
| Telescopic Camera Poles | 20mm – 60mm | 1mm – 1.5mm | T300/T700 | Natural |
| Carbon Fiber Antenna Masts | 30mm – 100mm | 2mm – 5mm | T300 / T700 | Natural |
| Robotic Arm Segments | 15mm – 20mm | 1.5mm – 3mm | T700 / M40J | Painted |
| Industrial Drive Shafts | 20mm – 200mm | 2mm – 5mm | T700 / T800 | Polished |
| Inspection Camera Poles | 20mm – 40mm | 1mm – 2mm | T300 | Natural |
| Large Diameter Structural Tubes | 100mm – 250mm | 3mm – 10mm | T300 / T700 | Raw or Polished |
| Precision Instrument and Probe Tubes | 6mm – 25mm | 0.6mm – 1.5mm | T700 / T1000 | Polished |
For aerial photography and survey applications, Xinbo’s carbon fiber antenna masts combine roll-wrapped round tube profiles with integrated telescopic systems.
Custom Round Tube Specifications: What to Include on Your Drawing
OEM/ODM customers who need custom carbon fiber round tubes should provide drawing or clear specifications and tolerances to receive an accurate quotation. The most common errors are submitting dimensions without tolerances. Xinbo’s engineering team will flag any missing parameters before production, but getting the drawing right from the start shortens the inquiry-to-production timeline significantly.
For most structural applications, the critical inputs are OD, wall thickness (or ID), length, and fiber grade. Surface finish determines whether polishing and clear coating are included in the unit price. Fiber orientation is the angle at which the carbon fiber plies are laid up in the tube wall. The default is 0°/90°, which gives balanced bending performance in all directions. If the tube will carry primarily torsional loads, such as a driveshaft or a rotating arm, a ±45° layup significantly improves torsional stiffness at no change in weight. Xinbo confirms the layup before production if it is not specified on the drawing.
| Drawing Parameter | Required | Notes |
|---|---|---|
| Outer Diameter (OD) | Required | Standard tolerance ± 0.15mm for natural finish,
± 0.1mm for polished, ± 0.1mm for painted finish |
| Inner Diameter (ID) or Wall Thickness | Required | Specify one, and Xinbo calculates accordingly |
| Length | Required | Standard tolerance ±1mm |
| Fiber Grade | Required | T300 applied as default if unspecified |
| Weave Pattern | Optional | 3K Twill default; UD available for high axial stiffness |
| Fiber Orientation / Layup | Optional | 0°/90° default; ±45° for torsion-dominated applications |
| Surface Finish | Required | Natural, Polished, Glossy Clear Coat, or Matte Clear Coat |
| CNC / Machining | Optional | End machining, threading, holes and slotting are available |
| Quantity and Lead Time | Required | Order quantities provided |
Frequently Asked Questions
What OD range do roll-wrapped carbon fiber tubes cover at Xinbo?
Xinbo manufactures roll-wrapped round tubes from 5mm to 500mm OD. Tubes above 500mm OD are available on request for specialist structural applications.
What is the minimum wall thickness for roll-wrapped carbon fiber round tubes?
The minimum wall thickness is 0.6mm. For thin-wall or small-diameter applications, Xinbo’s engineering team will confirm the achievable minimum at the drawing stage.
Does Xinbo manufacture carbon fiber round tubes in imperial OD sizes for US OEM orders?
Yes. Xinbo produces tubes at 25.4mm (1 inch), 38.1mm (1.5 inch), 50.8mm (2 inch), and 101.6mm (4 inch) OD to drawing, with wall thickness, fiber grade, and surface finish specified by customers.
What OD tolerance is available on polished carbon fiber round tubes?
Polished round tubes are produced to ±0.02mm to ±0.05mm OD tolerance, suitable for sliding telescopic fits, bearing housings, and precision-machined assemblies.
Can fiber orientation be customized for torsion-dominated load cases?
Yes. The standard layup is 0°/90° for balanced bending performance. A ±45° ply orientation is available for torsion-dominated applications, and unidirectional layups are available for maximum axial stiffness.
Xinbo Composites supplies custom roll-wrapped carbon fiber round tubes to customers in 100+ countries.
Request a quote with your drawing or specification sheet.
