Bambu Lab PA6-CF is a high-performance technical filament based on polyamide 6 (Nylon 6) reinforced with carbon fibers. It combines exceptional strength, stiffness and thermal resistance with good impact toughness, making it an ideal material for functional, structural and mechanical parts.

Key properties

In its dry state, PA6-CF offers a flexural strength of up to 151 MPa and a flexural modulus of 5460 MPa, ranking it among the stiffest filaments in the Bambu Lab portfolio. Carbon fiber reinforcement contributes to dimensional stability, reduced warping tendency and a matte technical surface with excellent vibration damping. The filament reaches a heat deflection temperature (HDT at 0.45 MPa) of 186 °C and a melting temperature of 223 °C, allowing it to withstand demanding operating environments. The filament diameter is 1.75 mm with a tolerance of +/- 0.03 mm, and the spool weight is 1 kg. The spool is made of high-temperature material and is reusable.

The material is prone to absorbing atmospheric moisture (saturated absorption up to 2.35 %); when moist, it loses strength and stiffness but gains toughness. To achieve full mechanical properties, the filament must be thoroughly dried before printing and kept in a low-humidity environment during printing. For more information about technical materials, see the nylon and carbon filaments categories.

Printing parameters

Who is Bambu Lab PA6-CF, 1 kg suitable for

This filament is intended for advanced users and professionals who need to manufacture mechanically loaded and heat-resistant parts. It is ideal for printing structural components, clamps, fixtures, jigs, parts for automotive, robotics, industrial machines and spare parts for equipment operating in dry environments. Thanks to its high stiffness and vibration resistance, it is suitable for load-bearing and functional prototypes as well as small-batch production. It is not recommended for models with high demands on dimensional stability that are exposed to humid environments. Alternatives for other applications can be found in the PETG, ABS or ASA sections.

Printing tips

• Always thoroughly dry the filament before printing at 80 °C for 8 - 12 hours - PA6-CF is extremely sensitive to moisture.
• During printing, keep the filament in a dry environment with a desiccant (< 20 % RH), ideally in a dryer or dry box.
• Use a hardened steel nozzle (0.4 - 0.8 mm). A stainless steel nozzle or a 0.2 mm nozzle are not suitable.
• The printer must have an enclosed chamber to maintain a stable temperature and minimize warping.
• The filament is NOT compatible with Bambu Lab AMS systems.
• Apply glue stick to the print bed for a reliable first layer.
• Remove supports within 2 hours after printing - once moisture is absorbed, they are harder to separate.
• For moisture protection, impregnate finished prints with lacquer, wax or another waterproof coating.
• When handling the filament and during post-processing (sanding, cutting), wear protective gloves - carbon fibers can irritate the skin.
• If increased toughness is required, prints can be deliberately moistened - the material becomes more impact resistant.