Which nozzle (brass, hardened, 0.6mm) should I use for which filament?

Match the nozzle to the filler. Plain PLA, PETG, and TPU do not need hardened steel on Bambu's table. Carbon fiber, glass fiber, marble, sparkle, and glow do. Diameter is the clog-versus-detail choice: 0.6 mm hardened for most fiber fills, and 0.4 mm hardened when the filament is Bambu PLA-CF, PETG-CF, marble, sparkle, or glow. Carbon fiber, clogs, metal fill, wood, and PETG-CF already cover the neighboring cases.

The table

Bambu's filament guide marks hardened steel not required for PLA Wood, standard PLA supports, PETG, and the TPU rows. PLA-CF and PETG-CF require it, and 0.2 mm is not compatible with those fills. The fiber section says to use hardened steel whenever you print carbon, glass, or particle-filled filament, and it names PLA-CF, PETG-CF, ABS-CF, PA-CF, marble, sparkle, and glow. The first choice is a 0.6 mm hardened nozzle because it clogs less. The second is 0.4 mm hardened, which keeps more detail. For Bambu PLA-CF, PETG-CF, marble, sparkle, and glow, that order flips: 0.4 mm hardened is the first choice. Larger diameters lose detail and gain clog resistance. The guide does not give a grams-to-failure number for brass.

PLA Basic is the plain row, 190–230 °C (374–446 °F), bed 35–45 °C (95–113 °F). PLA-CF is 190–230 °C (374–446 °F), bed 50–70 °C (122–158 °F), hardened flag set. PolyLite PETG is 220–250 °C (428–482 °F) and 70–90 °C (158–194 °F), with no hardened flag. PLA, PETG, and TPU are the hubs. The A1 ships with a 0.4 mm stainless nozzle. Hardened steel is a separate part. That stock nozzle is the right one for PLA Basic and the wrong one for PLA-CF.

The threads

r/3Dprinting sivlq6 is the brass nozzle worn into a slot by carbon-fiber filament. The score-31 comment calls the fill sandpaper, says brass nozzles were lost before a switch to steel, and says steel wears too, more slowly. Ruby tips are that comment's next idea, not a tested ranking. The score-6 comment's "less than 100 g" is the same thread. Treat it as a warning, not a lab result.

r/functionalprint 17l23e2 is a door knob and a 1/4-32 screw. The score-27 comment is about electroplating a plastic print. It is not a nozzle recommendation. The TPU-diameter thread, the stainless-for-PLA thread, and the ObXidian PETG thread had no excerpt attached, so this page does not take a setting from their titles. TPU already has Bambu's line that hardened steel is not required for TPU, and that 0.2 mm is not recommended.

Questions