Bambu Lab PA6-CF (Carbon Fiber Nylon): problems, parts and running costs

Checked: 2026-10-25

Summary

Owners report rough surfaces on wet filament, warping on larger parts and bed-adhesion difficulty on textured PEI that often needs glue. Recurring cost is the filament plus hardened nozzles, drying, glue and support material, with no filters or subscriptions. At the Bambu store starting price of $42.99 per kg it is a good buy only for owners who already have an enclosure, a hardened nozzle and drying capability.

Common problems and fixes

Wet filament gives rough surfaces — PA6-CF absorbs moisture quickly (2.35% saturated at 25 °C, 55% RH); wet filament produces rough “40 grit” surfaces and poor layer quality; dry at 80 °C for 8–12 h or 90–100 °C for 12 h and store sealed below 20% RH. [1][3][9]
Warping on larger parts — owners report warping, especially in passively heated chambers; print in an enclosure at 45–60 °C chamber temperature and use glue or adhesive. [9][10][14]
Bed adhesion on textured PEI — bed-adhesion problems are common on textured PEI and glue or nano-polymer adhesive is often reported as necessary; engineering or high-temperature plates are listed as compatible. [1][3][10]
AMS and 0.2 mm nozzle incompatibility — AMS is not compatible and 0.2 mm nozzles are not compatible; stainless steel nozzles are not recommended. [1][2]
Support removal timing — supports should be removed within 2 hours to avoid moisture softening. [2]
Dimensional stability limits — manufacturer warns PA6-CF is not recommended for thin or elongated parts requiring strength, stiffness and dimensional stability, and prints can become tougher in humid environments. [2]
Settings disagree between guide and TDS — nozzle 260–290 °C in the TDS versus 260–300 °C in the guide, bed 80–100 °C versus 100–120 °C, cooling 0–60% versus 0–40%, drying 80 °C for 8–12 h or 90–100 °C for 12 h versus 70–90 °C for about 12–16 h. [1][3][12]

Parts and consumables

Hardened steel nozzle (0.4, 0.6 recommended, 0.8 mm) — required because carbon fiber wears brass and stainless steel is not recommended. [1][2][6]
Glue or nano-polymer adhesive — often needed for bed adhesion on textured PEI. [10]
Support material (Support for PA/PET) — for overhangs and supports; remove within 2 hours. [2][3]
Drying equipment / oven time — drying at 80 °C for 8–12 h or 90–100 °C for 12 h before use. [1][3]

Yearly running cost

A typical owner spends the filament itself plus hardened nozzles, drying energy, glue or nano-polymer adhesive and support material; there are no filters, pods or subscriptions. Not enough data to put a firm yearly figure on it.

When it is a good buy

Bambu store lists PA6-CF starting at $42.99 per kg with 0.5 kg and 1 kg spool options (Bambu store, 2026), with 30-day returns, free shipping over $59 and over $199 to remote areas. At that price it is justified when a part needs dry-state stiffness, strength and heat resistance and the buyer already has an enclosure, hardened nozzle and drying capability; without that hardware total cost and difficulty rise. Bambu PA6-GF is the better choice when dimensional stability matters more than peak strength, since it showed less shrinkage in a creator test. [7][8]