Fillamentum Nylon FX256 Carbon Fiber Filament

Fillamentum's carbon fiber nylon filament brings industrial-grade performance to desktop and professional FDM printing, combining a robust polyamide base with chopped carbon fiber reinforcement to deliver parts that are stiffer, lighter, and more dimensionally stable than standard nylon alone. The nylon matrix gives the material inherent toughness and resistance to fatigue, while the embedded carbon fibers dramatically increase tensile strength and rigidity, making this filament a genuine alternative to machined metal or fiberglass composites for functional prototypes, jigs, fixtures, and end-use components. The matte black finish typical of carbon-filled nylons also gives printed parts a clean, technical aesthetic that suits engineering and automotive applications where appearance matters alongside performance.

On the bench

Because nylon is hygroscopic, Fillamentum packages this filament in moisture-resistant packaging and recommends printing directly from a dry environment or using a filament dryer before and during long print jobs to preserve mechanical properties and surface quality. The carbon fiber content, while boosting stiffness, also increases abrasiveness, so users are advised to print with a hardened steel or ruby-tipped nozzle to avoid premature wear that standard brass nozzles would suffer over extended use. Recommended print settings typically call for higher nozzle temperatures in the 250 to 270 degree Celsius range along with a heated bed to manage warping, and an enclosed printer helps maintain consistent chamber temperature, reducing layer delamination and improving overall part strength.

Living with it

Engineers and makers choose this filament when they need parts that can withstand mechanical stress, vibration, and moderate heat without deforming, such as drone frames, robotics components, tooling, and replacement parts for machinery. Its low warping tendency relative to unfilled nylon, combined with excellent layer adhesion when printed correctly, makes it a dependable choice for functional applications rather than purely cosmetic prints. Fillamentum's reputation for consistent filament diameter and quality control further ensures that this carbon fiber nylon prints reliably across a range of FDM machines, giving users confidence that the material's advertised mechanical properties translate into real-world performance on their finished components.