Bambu Lab PAHT CF

Bambu Lab PAHT-CF Filament — 1.75 mm, 1 kg

PAHT-CF stands for Polyamide High Temperature — Carbon Fibre. It's a PA12 nylon base loaded with chopped carbon fibre, and it sits at the serious end of Bambu Lab's engineering range. Where standard nylon soaks up moisture from the air and turns brittle and stringy, PA12 absorbs roughly half as much — so PAHT-CF keeps its mechanical properties and dimensional stability far better in humid conditions, which matters a great deal in an Australian workshop. The carbon fibre adds stiffness and reduces warping, and the whole composite stays strong and rigid at temperatures that would leave a PLA part sagging on a shelf.

This is a material for functional parts rather than display pieces: drone and RC frames, jigs and fixtures that live near heat, under-bonnet and engine-bay brackets, tooling, robot arms and end effectors, gears and bushings, and replacement machine components that need to survive real loads. It's aimed at makers, small manufacturers, engineering workshops and TAFE or university labs — not a first-week beginner filament, but very approachable if you've already printed ABS or ASA successfully.

Key Features

Carbon-fibre reinforced PA12 High heat resistance ~50% lower water absorption than standard PA-CF High stiffness & strength Low warping ±0.03 mm tolerance AMS & RFID compatible Matte technical finish

Like all Bambu Lab spools, PAHT-CF carries an RFID tag, so an X1, P1 or H2 series printer with an AMS reads the material type and colour automatically and loads the tuned profile for you — no guessing at settings for you.

Print Settings

• Nozzle temperature: 260–300 °C
• Bed temperature: 100–120 °C on both Smooth PEI and Textured PEI plates
• Print speed: under 100 mm/s — pushing harder hurts layer bonding on this material
• Part cooling fan: 0–40% only; too much cooling will delaminate your part
• Nozzle hardware: hardened steel is essential — carbon fibre will wear out a brass nozzle quickly
• Enclosure: strongly recommended. A stable, warm chamber keeps large parts flat and improves layer adhesion at these temperatures

Specifications

Available Colours

⬤  Black (70100)

PAHT-CF is offered in a single technical black — the carbon fibre content gives it a subtle matte, slightly speckled finish that hides layer lines well on functional parts.

Practical Tips

Dry it before every print, without exception. Even though PA12 absorbs less moisture than ordinary nylon, PAHT-CF is still hygroscopic and a damp spool is the single most common cause of disappointing results — you'll see popping and steam at the nozzle, furry stringing, poor layer adhesion and brittle parts. Dry at 80 °C for 8–12 hours in a filament dryer or oven, and print straight from a dry box if you can. Between prints, seal the spool in an airtight container with fresh desiccant rather than leaving it on the printer.

Set the machine up for abrasive material first. Fit a hardened steel nozzle before you load this spool — a brass one can wear noticeably within a single large print, and a worn nozzle quietly ruins dimensional accuracy long before it fails outright. Keep the part cooling fan low, slow the first layer down, and give tall or wide parts an enclosed, draught-free chamber. Because carbon fibre makes the material stiff, avoid tight filament path bends and let the spool unwind freely.