Pultruded Square Inner round Carbon Fiber Hollow Tube 10*10mm(OD) * 8.5mm(ID) * 1000mm(L)

This pultruded carbon fiber hollow tube features a 10mm outer square dimension with an 8.5mm inner round bore, delivering exceptional strength-to-weight ratios ideal for aerospace, robotics, and precision engineering applications. Aerospace engineers, drone manufacturers, and structural design specialists rely on this profile for load-bearing components that demand minimal weight without compromising rigidity. The 1.25mm wall thickness solves the critical engineering challenge of creating lightweight yet torsionally stiff structures for dynamic applications requiring high modulus carbon fiber reinforcement.

Product Overview

Pultruded carbon fiber tubes are manufactured through continuous pultrusion processes where carbon fiber rovings are drawn through a heated resin bath and then through a shaped die, creating uniform, defect-free composite structures with consistent fiber alignment. This manufacturing method ensures superior mechanical properties compared to wound or wrapped alternatives, with fibers oriented primarily along the longitudinal axis for maximum tensile and compressive strength. The square outer profile with round inner bore provides unique geometric advantages for mounting, fastening, and load distribution while maintaining the aerodynamic benefits of the internal rounded surface.

The 10x10mm square cross-section offers optimal structural efficiency for applications requiring both bending stiffness and torsional resistance, while the 1000mm length provides versatile sizing for drone arms, structural supports, precision measurement instruments, and composite framework assemblies. The round inner diameter eliminates stress concentrations at internal edges and facilitates smooth insertion of shafts, cables, or connecting rods. With a wall thickness of 1.25mm, this tube achieves an exceptional stiffness-to-weight ratio, typically weighing under 50 grams per meter while maintaining rigidity comparable to aluminum tubes three times heavier.

Key Specifications

Specification	Details
Product Type	Pultruded Carbon Fiber Hollow Tube
Outer Dimension	10mm x 10mm Square
Inner Dimension	8.5mm Round Bore
Wall Thickness	1.25mm
Length	1000mm
Material Composition	Carbon Fiber Reinforced Polymer (CFRP)
Fiber Type	High Modulus Carbon Fiber
Resin System	Epoxy Matrix
Weight	Approximately 45-50 grams per meter
Tensile Strength	Greater than 600 MPa
Flexural Modulus	Greater than 25 GPa
Density	Approximately 1.55-1.60 g/cm3
Surface Finish	Smooth Pultruded Surface
Brand	Premium Grade Carbon Fiber
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp

Key Features

• Precision Pultruded Construction: Continuous pultrusion manufacturing ensures consistent fiber alignment, uniform wall thickness, and superior mechanical properties with minimal defects or voids
• Exceptional Strength-to-Weight Ratio: Carbon fiber composite delivers tensile strength exceeding 600 MPa while maintaining a density of only 1.55-1.60 g/cm3, approximately 80 percent lighter than aluminum alternatives
• Dual Geometry Design: Square outer profile provides structural rigidity and mounting versatility, while the round 8.5mm inner bore eliminates stress concentrations and facilitates component insertion
• High Modulus Carbon Fiber: Flexural modulus exceeding 25 GPa ensures exceptional stiffness for precision applications requiring minimal deflection under load
• Chemical and Corrosion Resistant: Epoxy resin matrix protects against moisture absorption, salt spray, UV degradation, and chemical exposure without requiring protective coatings
• Excellent Dimensional Stability: Pultruded process creates tubes with tight tolerances and consistent geometry, ideal for precision engineering and CNC machining applications

Applications and Use Cases

• Drone and UAV Structures: Quadcopter and hexacopter arms benefit from the lightweight rigidity, with the 10mm profile providing optimal load distribution for motor mounts and payload attachment points
• Aerospace and Composite Structures: Aircraft control surfaces, fuselage reinforcement, and satellite structural components leverage the high modulus properties for weight reduction and improved fuel efficiency
• Robotics and Automation: Robotic arm segments and precision positioning mechanisms utilize the round inner bore for shaft insertion while the square outer profile provides mounting surfaces for actuators and sensors
• Medical Device Frames: Surgical instruments, diagnostic equipment stands, and patient support structures benefit from the corrosion resistance and biocompatibility of carbon fiber composites
• Precision Measurement Instruments: Optical benches, laser mounting systems, and coordinate measurement machine components require the exceptional stiffness and dimensional stability this tube provides
• Automotive Lightweight Components: Chassis bracing, suspension components, and roll cages in performance vehicles utilize carbon fiber tubes for weight reduction and improved handling dynamics

How to Use

Begin by assessing your application's load requirements, including static bending loads, torsional stresses, and dynamic impact forces to confirm the 10x10mm profile with 1.25mm wall thickness provides adequate safety margins. The round 8.5mm inner bore accommodates standard shaft diameters up to 8mm, allowing direct insertion of steel pins, aluminum rods, or composite shafts without additional machining. For mounting applications, the square outer profile enables straightforward attachment of brackets, clamps, and fastening hardware using standard M3 or M4 threaded inserts positioned at predetermined intervals along the tube length.

When cutting or machining the carbon fiber tube, use carbide-tipped tools with controlled feed rates to prevent delamination at cut edges. A fine-toothed saw or CNC milling machine with coolant application produces clean edges without fiber fraying. For joining multiple tube segments, consider carbon fiber-compatible adhesives like epoxy structural adhesives, mechanical fasteners through drilled holes, or composite sleeve couplers for seamless load transfer. Always support the tube adequately during machining to prevent vibration-induced damage, and wear appropriate respiratory protection when cutting carbon fiber composites to avoid inhaling fine particles. Allow adhesives to cure fully per manufacturer specifications before applying structural loads to ensure maximum joint strength and durability.

Frequently Asked Questions

What is the weight difference between this carbon fiber tube and an equivalent aluminum tube?

This carbon fiber tube weighs approximately 45-50 grams per meter, while an equivalent aluminum tube of similar outer dimensions would weigh approximately 220-250 grams per meter. This represents an 80 percent weight reduction while maintaining comparable or superior stiffness characteristics, making carbon fiber ideal for weight-critical applications like drones, aerospace structures, and precision instruments.

Can this tube be machined or cut to custom lengths?

Yes, the pultruded carbon fiber tube can be cut using fine-toothed saws, band saws, or CNC milling machines with carbide tools. For clean cuts without delamination, use controlled feed rates and coolant application. We recommend professional machining services for precision requirements. Custom cutting services are available through our technical support team for orders of 5 or more units.

What is the maximum continuous load this tube can support?

The maximum load depends on your specific application geometry, support conditions, and safety factor requirements. With tensile strength exceeding 600 MPa and flexural modulus greater than 25 GPa, this tube can typically support static bending loads of 50-80 kilograms when supported at both ends with a 1000mm span, depending on load distribution. For precise load calculations, consult our technical team with your specific application parameters.

Is this tube suitable for outdoor or marine applications?

Yes, the epoxy resin matrix provides excellent resistance to moisture, salt spray, UV radiation, and chemical exposure without requiring protective coatings. However, for long-term marine applications, we recommend periodic inspection for any surface degradation and application of UV-protective clear coatings in extreme sun exposure environments. The carbon fiber composite is inherently corrosion-resistant, unlike aluminum or steel alternatives.

Can fasteners be directly threaded into this tube?

Direct threading into carbon fiber is not recommended as the composite material may delaminate under threaded fastener loads. Instead, use threaded inserts (brass or stainless steel) installed with epoxy adhesive, or drill through-holes and use external fastening methods. For applications requiring multiple attachment points, pre-installed threaded inserts provide reliable, reusable fastening without damaging the tube structure.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

Buy Pultruded Square Inner round Carbon Fiber Hollow Tube 10*10mm(OD) * 8.5mm(ID) * 1000mm(L) Online in India