18 mm OD × 16 mm ID × 500 mm T300 Carbon Fiber Tube

18 mm OD × 16 mm ID × 500 mm T300 Carbon Fiber Tube

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Product overview

GBTECH 18×16×500 mm carbon fiber tube is a round T300 composite member with a 1 mm nominal wall and a matte twill surface appearance. The 500 mm format is a mid-length stock option for prototype members and replacement components. It provides more uninterrupted span than the 250 mm version without the handling length of a one-metre tube.

The 18 mm outside profile is the largest tube diameter in this listed range. Its 16 mm bore supports evaluation of larger inserts and internal passages, while the 1 mm nominal wall requires careful local connection design.

Product specifications

Mid-length supports and replacement parts

Choose this length when the assembly needs a member longer than 250 mm but does not require a full metre.

Potential uses to evaluate include larger equipment-frame prototypes, cable-routing members, rig and fixture supports. These are design directions, not certified load-bearing applications.

Connection and processing notes

• Confirm the actual 16 mm bore clearance before choosing fittings.

• Use reinforcement or load-spreading interfaces where the joint design requires them.

Use tooling and dust control suitable for carbon-fiber composites. Protect nearby electronics from conductive dust, finish cut edges as required, and validate bonded, clamped or fastened connections before use.

Temperature and design limits

The catalogue lists nominal heat resistance of 150°C. This is not a universal continuous-service temperature: confirm the test method, exposure duration, load and safety margin for the intended duty cycle.

Fiber orientation, resin, unsupported length and joint details determine suitability. Do not infer a certified strength or stiffness value from diameter alone.

Frequently asked questions

Why select 500 mm? The 500 mm format offers a mid-length option. Allow for cutting kerf and finishing if several smaller parts will be made from one piece.

How is wall thickness calculated? (18 − 16) ÷ 2 gives 1 mm nominal wall thickness; actual dimensional tolerances require confirmation.

Other lengths

Also available in the same diameter family:

• 250 mm length

• 1000 mm length

Request a quote

Request a quotation with the product number, required quantity, final dimensions or drawing, tolerance requirements and delivery country. Confirm pricing, packaging, availability and lead time with GBTECH before ordering.