Pultruded Square Inner round Carbon Fiber Hollow Tube 8*8mm(OD) * 6.5mm(ID) * 1000mm(L)

This pultruded carbon fiber hollow tube features a square outer profile of 8x8mm with a rounded inner diameter of 6.5mm, delivering exceptional strength-to-weight ratio for precision engineering applications. Professional engineers and composite specialists use these tubes in aerospace components, robotic arms, drone frames, and structural reinforcement where weight reduction and rigidity are critical performance parameters. The tube solves the engineering challenge of requiring high stiffness with minimal mass while maintaining dimensional accuracy and consistent material properties throughout the 1000mm length.

Product Overview

Pultruded carbon fiber tubes are manufactured through a continuous pultrusion process where carbon fiber reinforcement is drawn through a resin bath and heated die, creating a homogeneous composite structure with superior fiber alignment along the longitudinal axis. This manufacturing method ensures consistent wall thickness, precise dimensional tolerances, and uniform mechanical properties that cannot be achieved through hand-layup or filament winding techniques. The square outer geometry provides excellent mounting surfaces and structural efficiency, while the rounded inner diameter allows for smooth internal passages and reduced stress concentration points.

The 8x8mm outer dimension with 6.5mm inner diameter yields a wall thickness of approximately 0.75mm, optimizing the balance between structural rigidity and material efficiency. Carbon fiber composites exhibit tensile strength exceeding 600 MPa with a modulus of elasticity around 230 GPa, making this tube ideal for applications requiring precision alignment, vibration damping, and long-term dimensional stability. The pultruded construction eliminates porosity and voids common in other manufacturing methods, ensuring reliable performance in demanding aerospace, automotive, and industrial automation environments.

Key Specifications

Key Features

• Exceptional strength-to-weight ratio with carbon fiber tensile strength exceeding 600 MPa, delivering structural performance equivalent to steel at one-fifth the weight for aerospace and drone applications
• Precision pultruded construction ensuring consistent wall thickness, tight dimensional tolerances within plus-minus 0.1mm, and uniform fiber alignment for reliable engineering calculations
• Square outer profile with rounded inner diameter providing optimal mounting surfaces, reduced stress concentration, and smooth internal passages for cable routing or fluid flow applications
• Superior rigidity with elastic modulus around 230 GPa enabling minimal deflection under load, ideal for precision robotic systems, optical bench frames, and vibration-sensitive instrumentation
• Excellent chemical and environmental resistance with epoxy matrix protecting against moisture absorption, UV degradation, and corrosive industrial environments for long-term durability
• Low thermal expansion coefficient minimizing dimensional changes across temperature variations, critical for precision alignment in aerospace and thermal cycling applications

Applications and Use Cases

• Aerospace structural components including wing reinforcement ribs, fuselage stiffeners, and control surface actuator mounts where weight reduction directly improves fuel efficiency and payload capacity
• Unmanned aerial vehicle (UAV) frame construction for drone arms, booms, and fuselage sections requiring maximum strength with minimal mass to extend flight duration and improve maneuverability
• Robotic systems and automation equipment including robotic arm segments, precision positioning frames, and vibration isolation structures where stiffness prevents deflection-induced positioning errors
• Precision instrumentation and optical bench frameworks for laboratory equipment, laser systems, and measurement apparatus requiring dimensional stability and low thermal drift across extended operation periods
• Automotive racing applications including roll cage reinforcement, suspension components, and chassis bracing for high-performance vehicles where weight savings improve acceleration and handling dynamics
• Wind turbine blade internal structure and control rod mechanisms where carbon fiber tubes provide the required strength for multi-megawatt installations while reducing overall system weight

How to Use

Begin by carefully measuring and marking your cutting points on the tube using a fine-tipped marker and precision ruler to ensure accurate dimensions for your application. When cutting, use a diamond-grit saw blade or carbide-toothed band saw running at moderate speeds with light pressure to prevent fiber fraying and delamination at the cut edges. Always wear appropriate personal protective equipment including safety glasses and a dust mask, as carbon fiber particles can be irritating to respiratory systems and skin.

For joining and assembly, prepare tube ends by lightly sanding with 220-grit sandpaper to remove any rough fibers and create a clean surface. When bonding with epoxy adhesives, apply a thin, even coat to both mating surfaces and clamp firmly for the recommended cure time, typically 24 hours at room temperature. For mechanical fastening, drill pilot holes slightly smaller than your fastener diameter to prevent stress concentration, and use washers to distribute loads across the composite surface. Always allow adequate clearance around internal passages if routing cables or conducting fluid flow, and avoid sharp bends that could induce micro-cracking in the carbon fiber matrix.

Frequently Asked Questions

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Buy Pultruded Square Inner round Carbon Fiber Hollow Tube 8*8mm(OD) * 6.5mm(ID) * 1000mm

Buy Pultruded Square Inner round Carbon Fiber Hollow Tube 8*8mm(OD) * 6.5mm(ID) * 1000mm(L) Online in India

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