Nozzles & Plates
How long a nozzle lasts, and how to tell when it is done
Wear is uniform and gradual. Clogs are intermittent and sudden. Knowing which you have saves you from replacing the wrong thing twice.
By Michael W. · Published October 5, 2026
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Worn or clogged?
Worn: quality is uniformly poor and has declined gradually. Lines wider than the slicer intended, soft detail everywhere at once, dimensional accuracy drifting on every print.
Clogged: faults are intermittent and often arrived suddenly. Under-extrusion that comes and goes, gaps in walls, a print that was fine yesterday.
That distinction decides what you do. Wear needs a new nozzle. A clog needs clearing and, more importantly, finding the cause — clog procedure.
What actually wears a nozzle
Abrasive filler, almost exclusively. Carbon fiber, glass fiber, metal powder, mineral filler, glow pigment and glitter are all harder than the nozzle material, and each pass widens and rounds the orifice slightly.
Plain PLA, PETG, ABS, ASA and unfilled TPU barely wear a nozzle at all. A stainless nozzle running only those materials will outlast your interest in the printer.
The timescales are strikingly different. A stainless nozzle on PLA: effectively indefinite. A stainless nozzle on PLA-CF: a visible decline within a single spool, and with the worst filled filaments a single print can do measurable damage. Which filaments do this.
Why this page gives you no hours or kilograms
Because an honest number would need a controlled wear test, with measured orifice diameters before and after a known quantity of a known filament. This site has no measurement rig and has run no such test, so quoting "a hardened nozzle lasts X kilograms" would be invention dressed as data.
What is citable is the hardness ordering: hardened steel at HRA 74, tungsten carbide at HRA 90, and stainless below both. What is useful is the diagnostic above, which tells you when your nozzle is done regardless of anyone's numbers. How this site works.
The diagnostic sequence
| Symptom | Most likely | Next step |
|---|---|---|
| Every print has over-wide lines and soft detail | Worn nozzle | Replace; fit hardened if you run filled filament |
| Under-extrusion that comes and goes | Partial clog | Clear it and find the cause |
| Nothing extrudes at all | Full clog, or a feed failure | Push filament by hand to tell which |
| Dimensional accuracy drifted on everything | Worn nozzle, or flow calibration | Re-run flow calibration first — it is free |
| Fine detail lost but walls look fine | Worn nozzle | Replace |
| Problem started after a specific filament | That filament was abrasive | Check the filament against the hardened-nozzle list |
Note row four. Re-run flow calibration before concluding wear — it is free, it takes minutes, and it resolves a fair share of "my nozzle must be worn" cases.
Inspecting it directly
You can see wear if you look. A new nozzle has a crisp, circular orifice with a sharp edge. A worn one is visibly rounded and the hole is larger and less round. A phone camera with a macro mode is enough magnification.
Compare against a new nozzle if you have one, which is one more argument for keeping a spare — a reference as well as a replacement.
Where to go next
Hotend replacement for the procedure. Hardened vs stainless for what to replace it with. Spare parts worth stocking, since a spare hotend is near the top of that list.
What to buy
Stock photograph of this product class, not of this specific unit.
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1. What to replace it with
Bambu Lab Hotend with Hardened Steel Nozzle, 0.4 mm
If abrasive filament wore the last one out, hardened steel is the answer rather than another stainless nozzle.
A worn nozzle on a machine that has run filled filament tells you the material, not the nozzle, was the problem. Replacing stainless with stainless means you will be back here.
A complete hotend assembly in 0.4 mm hardened steel keeps your profiles valid and makes the swap a module change.
What it gets right
- Abrasive filament rounds a stainless nozzle fast — with the worst materials, a single print can do it
- Comes as a complete assembly, so the swap is a module change rather than a nozzle extraction
- 0.4 mm keeps your existing print profiles valid
What it does not
- Hardened steel conducts heat slightly worse than stainless, so very high-flow PLA needs a small temperature bump
- Pointless if you only ever print plain PLA and PETG — stainless lasts for years on those
- P1P and P1S only; the A-series and H-series need their own part
| Nozzle | Hardened steel, 0.4 mm |
|---|---|
| Fits | P1P and P1S (model FAH001-N-1) |
| Hardness reference | Hardened steel is cited at HRA 74 |
| Supplied as | Complete hotend assembly |
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2. The A-series equivalent
BIQU Panda Juicer Hotend
0.4 mm hardened steel for an A1, A1 mini or H2D, cheap enough to keep a spare.
A-series parts are a different catalog, and this is the hardened 0.4 mm option for an A1, A1 mini or H2D. Standard flow, so profiles stay close to right.
Cheap enough that keeping one on the shelf is reasonable, which is what turns a worn nozzle into a planned five-minute job rather than downtime.
What it gets right
- Hardened steel at 0.4 mm covers abrasive filament on the A-series, which the stock stainless nozzle does not
- Cheap enough to keep a spare on the shelf, which is the actual answer to a clog at 2 a.m.
- Standard flow means your existing profiles stay close to right
What it does not
- Standard flow, so it is not a speed upgrade — do not buy it expecting one
- A third-party hotend on a machine under warranty is a decision, not a free lunch
- A-series and H2D fitment only; it will not fit a P1S
| Nozzle | 0.4 mm hardened steel |
|---|---|
| Fits | Bambu Lab A1, A1 mini and H2D |
| Positioning | Standard flow, for daily printing and maintenance |
Questions people actually ask
How long does a Bambu Lab nozzle last?
On plain PLA, PETG, ABS and ASA, effectively indefinitely - those materials are not abrasive. On filled filament it can be a single spool for stainless, and with the worst materials a single print does visible damage. We publish no hour or kilogram figure, because measuring nozzle wear needs a controlled test this site has not run.
How do I know if my nozzle is worn out?
Wear is uniform and gradual: every print has lines wider than the slicer intended and soft detail everywhere at once. Intermittent faults are clogs, not wear. You can also inspect it - a new nozzle has a crisp circular orifice, a worn one is visibly rounded and larger.
Is my nozzle worn or just clogged?
Worn is uniform and gradual; clogged is intermittent and often sudden. If quality has slowly declined on everything, suspect wear. If extrusion comes and goes or a print that was fine yesterday fails today, suspect a clog. Re-run flow calibration before concluding either - it is free.
Does printing PLA wear out a nozzle?
Barely. Plain PLA has no abrasive filler, and a stainless nozzle running only PLA and PETG will outlast your interest in the printer. PLA-CF is a completely different material from a wear standpoint, despite the shared name.
Should I keep a spare nozzle?
Yes, and on a Bambu machine a spare complete hotend assembly is even better - it turns a clog or a worn nozzle into a five-minute module swap rather than an evening's work. It also gives you a new nozzle to compare a suspect one against.
Sources
- Bambu Lab hardened steel nozzle and hotend upgrade for the P1S - Bambu Lab wiki
- Hardened steel (HRA 74) and tungsten carbide (HRA 90) hardness figures, and H2C automatic hotend swapping - third-party lineup roundups captured October 2026
Read this next
- Clearing a clogged nozzleThe procedure for clearing a clog, plus the four causes behind it - because clearing without diagnosing gets you a repeat.
- Replacing a Bambu Lab hotendHow the complete-assembly hotend format works, the replacement procedure, what the silicone sock does, and the fitment rule to check first.
- Hardened steel vs stainless steel nozzlesHardened steel at HRA 74 versus stainless versus carbide at HRA 90 - which material your filament requires, and what each costs you.
- Do I need a hardened nozzle for this filament?The one rule that answers this for every filament, plus a per-material table covering PETG, ABS, CF, silk, wood, marble and glow.
- Spare parts worth having before you need themWhich spares to stock before a failure and which to order after, judged by how long the machine sits idle waiting.