Custom Carbon Fiber Square Tubes for Robotics and Industrial Use - Lightweight/High-Strength/Corrosion-Resistant/Precision-Cut/Durable Structural Comp

Product Description

Product Description

ROUND CARBON FIBER TUBE 
 
Our Round Carbon Fiber Tubes are engineered with high-strength carbon fiber tows (customizable) and aerospace-grade epoxy resin, manufactured through a precise filament winding process for consistent quality and performance.
 
With diameters from 6mm to 200mm and wall thickness down to 0.5mm, these lightweight carbon fiber tubes deliver outstanding structural efficiency—about one quarter the weight of steel while offering up to 5× the tensile strength.

Specification

Parameter Name	Parameter Value	Notes
Fiber Modulus Grade	T300/T700/T800	High-strength 230GPa, ultra-high strength 294GPa available
Resin Matrix Cure Temperature	180°C±5°C	High-temperature curing ensures complete molecular crosslinking
Fiber Orientation Angles	±45°/0°/90°	Multi-axial layup optimizes mechanical anisotropy
Winding Tension Control	15-25N	Constant tension control ensures consistent fiber pre-stress
Void Content Control Index	≤1.5%	Vacuum-assisted curing process ensures density
Surface Roughness	Ra≤3.2μm	Steel mandrel ensures inner wall smoothness
Surface Pattern	Twill/Plain/Forged/UD	Multiple Options
Machining Precision	+/-0.1mm (Small), +/-0.15mm (Large)	High-Precision CNC
Temperature Stability	-50°C to 120°C	No Major Distortion
Fatigue Resistance	2-3 Times That of Metals	Reliable Long-Term Use

Functional Advantages

WIDE SIZE RANGE & THIN WALL CAPABILITY
 
Available in 6–200mm diameter options with wall thickness as low as 0.5mm, making it suitable for compact structures, lightweight frames, and high-performance assemblies.

HIGH TOLERANCE & PREMIUM SURFACE QUALITY
 
Inner surface finish can reach Ra 3.2 or better using precision steel mandrels and release agents, with wall thickness consistency within ±0.05mm to support tight-fit and high-tolerance builds.

FATIGUE RESISTANCE & PROGRESSIVE FAILURE BEHAVIOR
 
Excellent fatigue performance (over 1,000,000 cycles of alternating loads) and a progressive failure mode that is valuable for safety-critical components.

STABLE PERFORMANCE IN HARSH ENVIRONMENTS
 
Maintains mechanical stability from -40°C to 120°C, and retains over 95% performance after 1000 hours at 85°C / 85% humidity, with optional UV-resistant coatings for exposed use.

MULTIPLE SURFACE & FINISH OPTIONS
 
Choose smooth for general use, lightly sanded for improved bonding, or UV-resistant coated finishes for visible, outdoor, or appearance-critical components.

Company Profile

FAQ

Q1: Do you manufacture 100% genuine carbon fiber? What grades of raw fiber do you use?
A: Yes, we strictly manufacture 100% genuine carbon fiber plates and tubes. Our standard sheets are pressed using high-strength T300 and T700 carbon fiber yarn (or equivalent high-modulus fibers) combined with high-grade epoxy resin. We do not use any fiberglass cores unless explicitly requested by the client for specific budget-friendly projects.
 
Q2:What is the maximum thickness and plate size you can press in-house?
A: Our raw carbon fiber plates are hot-press molded completely in-house. We can press sheets with thicknesses ranging from 0.5mm to 20.0mm. Our maximum sheet dimensions are 4.0 meters (Length) x 2.0 meters (Width), which is ideal for oversized structural panels or large-format automotive, marine, and industrial chassis.
 
Q3: What are your achievable CNC milling and thickness tolerances?
A: We operate two levels of CNC machining centers to meet different structural requirements:
For Ultra-Precision Parts (up to 1.2m length): We achieve standard machining tolerances of ±0.05mm and precision-grade tolerances down to ±0.03mm. Thickness consistency is strictly controlled during raw plate pressing.
For Large-Format Projects (up to 4.0m x 2.0m table size): We maintain a single-sided machining tolerance of ±0.1mm and a double-sided tolerance of ±0.1mm to ±0.2mm.
 
Q4: How do you prevent edge delamination and burrs during high-speed CNC routing?
A: Delamination (interlayer splitting) is the biggest failure point for composite parts. We prevent this through:
Optimized Resin-to-Fiber Ratio: Ensuring extremely high interlayer shear strength during plate pressing.
Specialized Tooling: Using custom-coated diamond/carbide compression routers designed specifically for carbon fiber.
Spindle Speed & Feed Control: Carefully programming feed rates and spindle speeds on our multi-axis routers to ensure a clean, smooth, and burr-free edge finish.

 
Q5: Can you perform custom edge-chamfering (beveling) and countersunk holes?
A: Yes. We can perform custom 45-degree and round edge-chamfering (beveling) of various depths to make the edges smooth to the touch. We also perform high-precision countersinking (milled sinkholes) strictly according to your mechanical drawings, ensuring screws sit flush with the carbon plate surface.

Q6: Do you supply carbon fiber tubes, and can they be custom-shaped?
A: Yes. We manufacture high-strength, roll-wrapped carbon fiber tubes. We offer:
Shapes: Round, square, rectangular, oval, and telescopic tubing systems.
CNC Processing on Tubes: We can precision CNC-drill holes, cut slots, and mill shapes on carbon tubes to fit your anodized aluminum connectors and mounting brackets.
 
Q7: What CAD drawing file formats do you accept for quoting and production?
A: For 3D models (ideal for CNC evaluation, fitment check, and quotes), we accept: STP.STEP, and . IGS. For 2D flat layouts (ideal for flat plate cutting and profiling), we accept DXF and DWG.
 
Q8: How do you guarantee the confidentiality of our proprietary CAD drawings?
A: We strictly respect and protect our clients' intellectual property. We are fully prepared to sign a Non-Disclosure Agreement (NDA) before you send any drawings. All drawings are restricted to our internal engineering and CNC programming teams, and we never share client-designed parts on public channels without written consent.
 
Q9: What manufacturing processes do you use for 3D/complex custom-shaped parts?
A: We primarily utilize two high-performance molding processes depending on your design requirements, quantity, and budget:
Compression Molding: Pre-preg carbon fiber is placed in matched metal molds and cured under high pressure and temperature. This is ideal for medium-to-high volume production requiring high dimensional consistency and double-sided smooth finishes.
Autoclave Molding: Pre-preg is laid up in a single-sided mold, vacuum-bagged, and cured under precise pressure and temperature. This is preferred for high-strength, ultra-lightweight, and complex aerodynamic structures (such as car spoilers or drone canopies) requiring maximum structural integrity.