Polymaker Fiberon™ PA6-GF25 /gray/

It is designed for machine components, automotive parts, housings, assembly fixtures, jigs and other functional parts requiring high stiffness, strength and heat resistance. It is particularly suitable for parts that must retain their geometry under mechanical and thermal loads.

The recommended nozzle temperature is 280–300°C, with a build plate at 40–50°C. An all-metal hotend capable of operating reliably at these temperatures is required. Fiberon specifies speeds of up to 300 mm/s when the printer can provide the necessary volumetric flow.

No. Fiberon™ PA6-GF25 is formulated for printing at room temperature without an actively heated chamber. Warp-Free™ technology limits shrinkage and allows reliable printing under considerably less demanding conditions than many standard PA6 materials.

For this particular material, a hotter build plate can be counterproductive. Polymaker recommends not exceeding 50°C because higher temperatures accelerate PA6 crystallisation and can increase warping. The best starting range is 40–50°C.

Yes. Glass fibres are highly abrasive, so a hardened steel or other wear-resistant nozzle is recommended. Polymaker states that a standard brass nozzle lasts approximately 9 hours when printing PA6-GF25, making a wear-resistant nozzle effectively essential for regular use.

Yes. PA6 is highly hygroscopic, and moisture quickly affects print quality and mechanical properties. For moisture-exposed filament, Polymaker recommends 100°C for 10 hours, or PolyDryer Level 3 for around 18 hours. Feeding directly from a dry box or dryer is good practice for long prints.

No. The recommended part cooling fan setting is 0%. Strong cooling can reduce layer adhesion and increase internal stresses, so PA6-GF25 is printed without the standard active cooling used for PLA.