IIID Max – FiberX PA6/66+CF15 500gr Filament

IIID Max – FiberX PA6/66+CF15 Nylon Carbon Fiber Filament 500g

This is not your typical carbon fiber filament. The FiberX PA6/66+CF15 combines a Nylon 6/66 blend with 15% carbon fiber reinforcement — delivering industrial-grade mechanical properties that rival injection-molded engineering plastics. At $35.90 for a 500g spool (originally $69.90 — 49% off), it's an exceptional value for professional and engineering applications.

PA6/66 nylon provides the toughness, impact resistance, and heat deflection that PLA-based carbon fiber filaments simply cannot match. The 15% carbon fiber content adds extreme stiffness and dimensional stability. This is the filament for parts that need to perform under real mechanical loads.

Key Specifications

PA6/66+CF15 vs. Carbon Fiber PLA+

Carbon Fiber PLA+ is easy to print and affordable — great for stiff, lightweight parts at moderate temperatures. PA6/66+CF15 is for when you need significantly higher heat resistance (200°C vs 60°C), superior impact toughness, and real engineering-grade performance. The tradeoff is harder printing — you need an all-metal hotend, enclosed printer, and dry filament storage.

Pro Tips

Dry at 80°C for 8–12 hours before printing — nylon-based filaments absorb moisture aggressively. Print from a dry box. Use hardened steel nozzle at 0.5mm minimum. Bed adhesion: PVA glue stick on PEI at 90°C. Print slow (40–50mm/s) for maximum layer adhesion. This filament produces parts strong enough to replace machined aluminum in many low-load applications.

Best Applications

Structural brackets, jigs and fixtures for manufacturing, automotive under-hood components, drone arms, robotics parts, industrial tooling, functional prototypes for testing, and any part requiring the combination of high heat resistance, stiffness, and impact toughness.

For an easier-to-print carbon fiber option, see our Carbon Fiber PLA+ Filament. Explore all engineering materials in our 3D Printing Filaments guide.