Bambu Lab PAHT-CF
Manufactured by Bambu Lab
Quick Summary
PAHT-CF is Bambu’s high-temperature carbon-filled nylon, and it exists for parts that have a job: gears, mounts, tool holders, anything that sees load and heat at the same time. It prints at 260-290 °C with an 80-100 °C bed and a warm chamber, and it will not tolerate being printed wet.
Print Settings That Work
275 °C nozzle, 90 °C bed, chamber warm, cooling off or minimal. Use a 0.6 mm hardened nozzle: Bambu recommends it over 0.4 mm because the fibre-loaded melt clogs a fine nozzle far more readily, and brass is destroyed either way.
Dry at 80 °C for 12 hours before the first print and keep the spool in a dry box while it runs. This is the single largest quality lever. A dry spool prints glossy black walls with tight seams; the same spool after a day in the open prints rough grey walls with visible bubbling.
Adhesion wants a smooth PEI plate with a thin glue layer, or a garolite sheet. Bare textured PEI gives up around the third hour on a large footprint.
Print Quality
Parts come out stiff, dark, and matte with the speckled carbon look. Dimensional stability is good for a nylon, which is the main benefit of the fibre filling: unfilled nylons shrink and creep noticeably more.
Layer adhesion is strong when the chamber is warm, and the material holds usable strength at temperatures that would leave a PETG bracket sagging. Wear resistance is excellent, which is why printed gears in this material outlast the same gear in anything cheaper.
Surface detail is only fair. Small text and fine geometry blur, and the 0.6 mm nozzle recommendation makes that worse. Design accordingly.
Where It Falls Short
Cost is the first objection and drying is the second. You need a hardened nozzle, an enclosure, a dryer, and the patience to plan a print a day ahead. Nylon also stays hygroscopic in service, absorbing moisture from air over months and losing a little stiffness as it does.
Verdict
Buy PAHT-CF when a printed part has to do mechanical work in a warm place and you have the equipment to run it properly. For housings and brackets that only need to survive a hot day, ABS or ASA is cheaper and far less demanding. For impact-heavy parts, unfilled CoPA is the better nylon.
- Bambu Lab PAHT-CF vs polymide pa6 cf — Two carbon-filled nylons in the same class. PA6-CF is stiffer and runs hotter; PAHT-CF prints slightly more easily and handles humidity in service a little better.
- Bambu Lab PAHT-CF vs polymide copa — CoPA is unfilled and far tougher under impact; PAHT-CF is the stiffer, more dimensionally stable choice for parts under sustained load.
- Bambu Lab PAHT-CF vs bambu abs — ABS is the cheap way to get heat resistance in a housing; PAHT-CF is what you print when the part transmits force.
What temperature should I print PAHT-CF at?
The data sheet gives 260-290 °C at the nozzle with an 80-100 °C bed and a 45-60 °C chamber. A 0.6 mm hardened nozzle is recommended over 0.4 mm because it clogs less with the fibre-filled melt.
How long do I need to dry PAHT-CF?
Bambu specifies 80 °C for 12 hours, with 8 hours as a minimum for stable extrusion. Nylon takes on moisture quickly enough that a spool left in open air overnight will print visibly worse the next morning.
Is PAHT-CF worth it over PETG?
Only when the part needs it. PAHT-CF holds strength at temperatures where PETG softens, resists wear far better, and is much stiffer. It also costs several times as much and demands a hardened nozzle and a dryer.