Carbon Fiber Square Tube 200mm — RC Airplane, Drone & Model Frames (2mm–10mm OD)

Match the outer dimension (OD) to your frame slot or clamp size. For RC airplanes and small drones, 2–4mm OD tubes are typically used for control linkages and lightweight spars. Larger builds generally require 6–10mm OD tubes for main structural members. The variant name shows OD × ID × Length — for example, "5*5*4*200mm" means 5mm OD, 4mm ID, 200mm long. Always verify the inner diameter if you plan to insert a rod, wire, or fastener through the tube.

Wall thickness is typically 0.5–1mm per side depending on the variant. As a reference: the 2×2mm tube has a 1mm ID (≈0.5mm wall per side), and the 10×10mm tube has an 8mm ID (≈1mm wall per side). For exact dimensions, refer to the OD and ID values listed in the variant selector above.

Carbon fiber composite tubes generally offer a tensile strength in the range of 600–700 MPa and an elastic modulus of approximately 70 GPa, making them significantly stiffer and lighter than aluminum extrusions of the same cross-section. Actual load capacity depends on wall thickness, unsupported span length, and the direction of the applied load. For structural calculations, contact us to confirm material spec sheets.

Carbon fiber itself does not rust or corrode. The epoxy resin matrix provides good moisture resistance for typical outdoor hobby use, including RC flying in light rain or humid conditions. For prolonged exposure to UV sunlight or saltwater environments, applying a clear protective coating (such as thin CA glue or UV-resistant lacquer) over the surface is generally recommended to preserve the resin and prevent surface chalking over time.

These square tubes are designed to fit standard hobby-grade square clamps, brackets, and frame connectors sized for the corresponding outer dimension. Always verify the OD of the tube against your hardware specification before ordering. In most cases, light sanding with 400-grit sandpaper can fine-tune the fit for tight-tolerance clamps. Round-bore connectors are not compatible with square tubes without an adapter.

Yes. Carbon fiber square tubes can be cut with a rotary tool fitted with a cutting disc, a fine-tooth hacksaw, or a diamond-coated blade. Always wear a dust mask (N95 or better) and safety glasses when cutting, as carbon fiber dust is a respiratory and skin irritant. After cutting, seal the exposed end with thin CA glue or epoxy to prevent edge delamination and fiber fraying.

For small park-flyer or micro fixed-wing models (wingspan under 600mm / 24"), a 3×3mm or 4×4mm square tube typically provides a good balance of stiffness and weight. Larger sport or scale models with wingspans of 1000mm (≈39") or more generally benefit from 6×6mm or 8×8mm spars. If you are unsure, contact us with your airframe weight and wingspan and we can help you select the appropriate profile.