Pultruded Carbon Fibre Tube (Hollow) 4mm * 2mm * 1000mm (Pack of 4)

The Pultruded Carbon Fibre Tube is a high-strength, lightweight hollow structural component manufactured through continuous pultrusion process, delivering exceptional stiffness-to-weight ratios for precision engineering applications. Aerospace engineers, robotics developers, and UAV manufacturers rely on these tubes for building load-bearing structures that demand minimal weight without compromising tensile strength or dimensional accuracy. This product solves the critical engineering challenge of creating rigid yet portable frameworks where traditional aluminum or steel alternatives would add excessive mass and reduce performance efficiency.

Product Overview

Pultruded carbon fibre tubes are manufactured using the pultrusion process, where continuous carbon fibre reinforcement is pulled through a heated resin bath and then through a shaped die, creating a uniform, void-free composite structure with exceptional fiber alignment. This manufacturing method ensures consistent mechanical properties throughout the tube length, with fibers oriented primarily along the longitudinal axis for maximum axial strength. The 4mm outer diameter with 2mm inner diameter creates a thin-walled tube with optimal strength-to-weight characteristics, ideal for applications requiring precision dimensional tolerances and high rigidity in compact spaces.

What distinguishes this pultruded carbon fibre tube is its superior surface finish, consistent wall thickness of approximately 1mm, and resistance to environmental degradation. Unlike hand-laid composites, pultrusion delivers superior fiber volume fraction (typically 60-70%) and eliminates micro-voids that compromise strength. The 1000mm length per tube in a pack of four provides flexibility for prototyping, testing, or multi-component assembly projects. The material exhibits excellent fatigue resistance, zero corrosion issues, and maintains structural integrity across temperature ranges from -40°C to +120°C, making it suitable for both indoor precision work and outdoor environmental exposure.

Key Specifications

Specification	Details
Product Type	Pultruded Carbon Fibre Hollow Tube
Outer Diameter	4mm
Inner Diameter	2mm
Wall Thickness	Approximately 1mm
Length per Tube	1000mm
Pack Quantity	4 tubes
Total Length	4000mm (4 meters)
Material Composition	Carbon Fibre Reinforced Epoxy Resin
Tensile Strength	Approximately 1200-1400 MPa
Elastic Modulus	Approximately 60-80 GPa
Density	Approximately 1.55-1.60 g/cm3
Surface Finish	Smooth, Glossy Composite Surface
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

• Exceptional Strength-to-Weight Ratio: Delivers tensile strength of 1200-1400 MPa while weighing approximately 1.5-1.6 g/cm3, enabling lightweight structural designs without sacrificing load-bearing capacity
• Precise Dimensional Tolerances: Pultrusion manufacturing ensures consistent 4mm outer diameter and 2mm inner diameter across all tubes with minimal variation, critical for precision assembly and fitting applications
• Superior Rigidity and Stiffness: Elastic modulus of 60-80 GPa provides exceptional resistance to bending and deflection, ideal for frameworks requiring minimal flex under operational loads
• Corrosion and Chemical Resistance: Carbon fibre composite matrix resists moisture absorption, salt spray, UV degradation, and most industrial chemicals, ensuring long-term durability without maintenance
• Consistent Fiber Alignment: Pultrusion process aligns carbon fibres along the tube axis, maximizing longitudinal strength and creating predictable, repeatable mechanical properties for engineering calculations
• Excellent Fatigue Performance: Material withstands millions of load cycles without crack initiation, suitable for dynamic applications and vibration-prone environments

Applications and Use Cases

• Drone and UAV Frame Components: Engineers use these tubes as boom arms, landing gear supports, and fuselage reinforcements where the 4mm diameter provides structural rigidity while keeping total aircraft weight under critical limits for extended flight duration
• Precision Robotics Actuators and Links: Robotic arm joints and connecting links benefit from the high stiffness-to-weight ratio, enabling faster acceleration and more precise positional accuracy in industrial automation systems
• Aerospace Structural Elements: Aircraft interior components, antenna booms, and sensor mounting brackets utilize these tubes for their corrosion resistance and ability to maintain dimensional stability across wide temperature variations during flight operations
• High-Performance Sports Equipment: Archery arrow shafts, fishing rod blanks, and bicycle frame reinforcements leverage the material's lightweight nature and exceptional straightness to improve performance and reduce fatigue in athletes
• Scientific Instrumentation Frames: Laboratory equipment frameworks, telescope mounts, and precision measurement apparatus benefit from the material's dimensional stability, vibration damping characteristics, and resistance to environmental fluctuations
• Medical Device Structures: Surgical instrument handles, orthopedic support frames, and diagnostic equipment housings use these tubes for biocompatibility, sterilization resistance, and excellent mechanical reliability

How to Use

Begin by measuring and marking your required tube length using a fine-tipped marker or tape measure, as carbon fibre tubes can be precisely cut using a carbide-toothed saw, diamond-coated cutting disc, or specialized composite cutting tool. When cutting, support the tube firmly in a vise or clamp to prevent splintering, and wear appropriate personal protective equipment including safety glasses and a dust mask, as carbon fibre particles can irritate respiratory passages. After cutting, gently sand the cut edges with 120-150 grit sandpaper to remove any sharp burrs or delamination, then clean with a soft brush to eliminate loose fibres.

For assembly and joining, carbon fibre tubes can be bonded using two-part epoxy adhesives specifically formulated for composite materials, or mechanically fastened using carefully drilled holes with appropriate fasteners. When drilling, use a sharp carbide drill bit at moderate speeds (1000-2000 RPM) with light feed pressure to prevent delamination at the hole exit. For load-bearing applications, consider using tube inserts or reinforcing sleeves around fastener holes to distribute stress and prevent localized failure. Always allow epoxy adhesives to cure fully according to manufacturer specifications before subjecting bonded joints to operational loads, typically 24 hours at room temperature or accelerated curing at elevated temperatures.

Frequently Asked Questions

What is the weight of this 4-tube pack, and how does it compare to aluminum tubes of similar dimensions?

The complete pack of four 1000mm carbon fibre tubes weighs approximately 25-30 grams total, or roughly 6-8 grams per tube. An equivalent aluminum tube of the same 4mm outer diameter and 2mm inner diameter would weigh approximately 35-45 grams per tube, making carbon fibre approximately 40-50% lighter. This significant weight advantage translates directly to improved performance in weight-sensitive applications like drones, where every gram affects flight time and maneuverability.

Can these carbon fibre tubes be cut or modified, and what tools are required?

Yes, these tubes can be cut to custom lengths using a fine-toothed saw, diamond-coated cutting disc, or specialized composite cutting equipment. We recommend using carbide-tipped tools at moderate speeds with light feed pressure. Always wear safety equipment including eye protection and a dust mask. After cutting, sand the edges with 120-150 grit sandpaper to remove burrs. For drilling, use sharp carbide drill bits at 1000-2000 RPM with light pressure to prevent delamination. Avoid high-speed cutting that generates excessive heat, which can damage the resin matrix.

What is the maximum load this 4mm x 2mm tube can safely support in cantilever and simply-supported beam configurations?

Load capacity depends on tube length, mounting configuration, and safety factor requirements. For a 100mm cantilever length, this tube can typically support 5-8 kg point loads. For a 500mm simply-supported span, expect approximately 2-3 kg distributed load capacity. However, these are approximate values and actual capacity varies based on resin type, fiber volume fraction, and specific pultrusion parameters. For critical load-bearing applications, we recommend performing finite element analysis (FEA) or consulting with a composite materials engineer to validate specific design requirements and ensure adequate safety margins.

Are these tubes suitable for outdoor use, and how do they perform in UV exposure and moisture conditions?

Carbon fibre composite tubes exhibit excellent outdoor durability when manufactured with UV-stabilized epoxy resin systems. The material resists moisture absorption (typically less than 1% water uptake), making it ideal for marine and outdoor applications. However, extended UV exposure can gradually degrade the epoxy resin matrix, potentially reducing surface gloss and long-term strength. To maximize outdoor lifespan, consider applying UV-protective clear coatings or painting the tubes. Our standard pultruded tubes are suitable for outdoor use with proper maintenance, and they will maintain structural integrity for 10+ years in typical outdoor conditions.

How should I join or bond these tubes together for structural assemblies?

Carbon fibre tubes can be joined using three primary methods: epoxy adhesive bonding, mechanical fastening with bolts/rivets, or hybrid approaches combining both methods. For adhesive bonding, use two-part epoxy formulated specifically for composites, and ensure both surfaces are clean and lightly sanded for optimal adhesion. Cure time is typically 24 hours at room temperature. For mechanical fastening, drill carefully using carbide bits at moderate speeds, and consider using tube inserts or reinforcing sleeves around holes to distribute stress. Hybrid joining (adhesive plus fasteners) provides maximum reliability for critical load-bearing applications. Always test your joining method on scrap material before implementing on final assemblies.

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 custom

Buy Pultruded Carbon Fibre Tube (Hollow) 4mm * 2mm * 1000mm (Pack of 4) Online in India

Purchase the Pultruded Carbon Fibre Tube (Hollow) 4mm * 2mm * 1000mm (Pack of 4) online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat.

Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.