3D Printing Ranked
What Layer Height Can You Actually Use, and Is a 0.6mm Nozzle Worth Fitting?
After reading this you should be able to set a layer height for the nozzle currently in your printer without guessing, know the one limit your slicer will not warn you about, and — before you spend money — check that the larger nozzle you are considering physically fits your machine and know which other settings have to move with it.
If you have the standard 0.4mm nozzle fitted, the usable band runs from about 0.08mm or 0.10mm at the bottom, depending on whose rule you follow, to somewhere between 0.28mm and 0.32mm at the top. Bambu Lab lists 0.2mm as the standard layer height for a 0.4mm nozzle (published). The practical answer is: type your intended value into your slicer and see what it accepts, because the slicer is enforcing a limit your printer's own profile carries. A percentage you half-remember from a forum is not. But the slicer's limit is not the only ceiling, and the second one is covered further down.
The published rules agree more than they look like they do
Five published figures exist across three sources, and they are not five different answers. Prusa's knowledge base article on layers and perimeters states that layer height should be below 80% of nozzle diameter, giving about 0.32mm as the maximum for a 0.4mm nozzle (published). Prusa's separate article on creating profiles for different nozzles states 70-80% at maximum (published). Bambu Lab's layer height wiki page states a reasonable range of 20% to 70%, naming 0.08mm to 0.28mm for a 0.4mm nozzle (published). Bambu Lab's nozzle introduction page states 25% to 75%, naming 0.1mm to 0.3mm for the same nozzle with 0.2mm standard (published). Orca Slicer's documentation states the optimal range is between 20% and 80% of nozzle diameter (published).
Read together, all five put the ceiling somewhere in the 70-80% band. The disagreement is about where in that band, not about the band. Each manufacturer publishes two different figures on two different pages, so this is not one company being inconsistent — it is the whole category quoting a soft rule with slightly different rounding. Two of the sources say what goes wrong above it, which is the part worth carrying: Prusa's profile-creation page states that above 70-80% layer adhesion will be significantly compromised (published), and Orca Slicer's documentation states that over 80% there is increased risk of layer adhesion issues and reduced print quality (published).
There is a further wrinkle. Manufacturer profiles are often more conservative than the manufacturer's own articles. In the comments on Prusa's 2018 nozzle article, a reader wrote on 15 June 2018 that the MK2 0.6mm profile capped maximum layer height at 0.35 rather than the 0.48 the article implies; on 20 June 2018 a Prusa staff member replied that the limit is for the variable layer height function and invited him to raise it, since the defaults are deliberately conservative (published). Inference from that reply: the number your slicer enforces is a profile setting chosen for safety margin, not a physical wall, which is why it can sit below the published rule and why it can be edited.
A 2017 thread in Prusa's archived MK2 forum is sometimes cited as evidence that the guidance conflicts. It is not. In it, one user described 50% of nozzle diameter as finished quality and up to 80% as acceptable for draft parts — a single quality-dependent scale, not two competing ceilings — and a moderator gave a range of about 20% to 75 or 80% (published). That moderator's signature states he has no affiliation with Prusa Research (published). It is user opinion, nine years old, and it broadly matches what the manufacturers publish.
Setting the layer height for the nozzle you already have
- Read the diameter of the nozzle actually fitted. Prusa states you can identify the diameter by the number of dots, or a marked number, around the rim of the nozzle, and that Prusa Nozzles carry a size marking on the metal tube (published). Other manufacturers mark nozzles differently, so check your own manufacturer's page rather than assuming any particular marking. In PrusaSlicer the value is recorded under Printer Settings, Extruder #, nozzle diameter (published).
- Load a ready-made profile if one exists, rather than editing fields. Prusa states that Original Prusa printers in PrusaSlicer have built-in profiles for a variety of nozzle sizes, reached through Configuration, Configuration Wizard, Prusa FFF, where you tick the boxes for the profiles you want to import (published). This is the supported route on a Prusa machine and it sets everything at once.
- If you do hand-edit the nozzle diameter, set the extrusion width too. Prusa states that setting up the extrusion width is the most important thing when creating a profile for a new nozzle, that it should generally be about 110% of nozzle diameter, and that PrusaSlicer will derive 1.125 times nozzle diameter if you enter 0 (published). A Prusa staff member makes the same point in the blog comment thread: the main thing that changes with a different nozzle is the extrusion width (published). Change the diameter alone and you will print at the wrong width.
- Enter your intended layer height and let the slicer correct you. In Bambu Studio the enforced band for the current nozzle is visible under Printer settings, Extruder (published). On Bambu's variable layer height page the 0.08-0.28mm band for a 0.4mm nozzle is described as coming from their own laboratory testing, with the advice not to modify it (published). In PrusaSlicer the same limits live per-extruder; Prusa's guidance for running different diameters on different extruders of a multi-tool printer — a workflow Prusa itself labels experimental, because it requires tweaking several settings and some nozzle combinations may be incompatible — recommends changing the minimum and maximum layer height limits for the corresponding extruder (published).
- Check the flow rate, because the slicer's percentage limit will not. See the next section. This is the step that decides whether a layer height your slicer accepted will actually print well.
The ceiling nobody puts in a percentage: volumetric flow
A percentage of nozzle diameter is not the only limit. Layer height multiplied by extrusion width multiplied by print speed is a volumetric flow rate, and every hotend has a maximum melt rate above which it cannot keep up. In the same Prusa forum thread quoted above, the moderator answering the general question about acceptable layer heights gave a hardware number alongside his percentage range: the E3D V6 has a maximum melt volume of just over 10 mm3/s, or just over 4 linear mm of 1.75mm filament per second (published).
One thing in that thread is easy to misread, so be clear about it. The thread was opened by a user whose hotend leaked plastic between the heater block and the radiator after a slicer bug sent a 2mm first layer through a 0.4mm nozzle — but the answer he got was not about flow at all. The moderator told him the nozzle was wrongly installed, and to heat the hotend to 250-260 degrees C and tighten the nozzle against the heat block with spanners; another member wrote that a nozzle leaks only because it is loose, and that this has nothing to do with slicer settings (published). If plastic is escaping from your heater block, that is a mechanical fix, not a settings one. The melt-rate ceiling is a separate problem with a different symptom.
Bambu Lab states the same constraint in general terms: when the layer height is set relatively high the extrusion flow rate is relatively large, and a slower printing speed is required for the hot end to fully melt the extruded filament, which is why their 0.08mm, 0.20mm and 0.28mm presets carry different default print speeds (published). Inference, using Prusa's own 110% figure for extrusion width on a 0.4mm nozzle: 0.20mm x 0.44mm x 100mm/s is about 8.8 mm3/s, and 0.28mm x 0.44mm x 100mm/s is about 12.3 mm3/s. Raising layer height alone, with speeds untouched, crosses the just-over-10 figure quoted for an E3D V6. That rectangular estimate runs a little high because a real extrusion has rounded edges, but the crossing is the point. Exceeding melt rate shows up as under-extrusion, not as a slicer error. Prusa staff advise that with really big nozzles, 0.8mm and above, you may want to either slow down to let the plastic get properly heated or increase the temperature a bit (observed, blog comment, 25 June 2018).
Set the first layer separately from the rest. Prusa profiles always use 0.20mm as the first layer height regardless of the layer height chosen for the body of the print (published) — note that this is a different setting from the layer height used for the rest of the print, and no source compiled here states Prusa's default body layer height. Bambu Studio's system presets set first layer height to 50% of nozzle diameter, which also gives 0.2mm on a 0.4mm nozzle (published). Orca Slicer's documentation recommends 0.25mm first layer for a 0.4mm nozzle (published).
| Nozzle diameter | 70-80% ceiling band (computed here) | Figures a manufacturer or slicer actually publishes for this diameter |
|---|---|---|
| 0.2mm | 0.14-0.16mm | Bambu Lab: typically 0.05-0.12mm, stated as 25-60% of nozzle diameter. Orca Slicer: 0.04-0.16mm. Bambu's published range sits below the 70-80% band, because fine nozzles are bought to print fine layers |
| 0.25mm | 0.175-0.20mm | No per-diameter layer figure for 0.25mm appears in the Prusa sources compiled here, though Prusa sells the diameter for Nextruder printers. Orca's table has no 0.25mm row. Prusa does state that flexible materials are problematic at this diameter due to the higher pressure required, and composites are out of the question |
| 0.4mm | 0.28-0.32mm | Prusa: about 0.32mm maximum. Bambu layer height page: 0.08-0.28mm. Bambu nozzle page: 0.1-0.3mm with 0.2mm standard. Orca Slicer: 0.08-0.32mm |
| 0.6mm | 0.42-0.48mm | Prusa: up to 0.48mm, from a 2018 article. Bambu: 0.15-0.45mm, with 0.3-0.4mm common. Orca Slicer: 0.12-0.48mm. Separately, a reader reported in June 2018 that the shipped MK2 0.6mm profile in Slic3r PE capped at 0.35mm; Prusa staff replied that was the variable layer height limit and could be raised |
| 0.8mm | 0.56-0.64mm | Bambu: 0.2-0.6mm, with 0.4-0.5mm typical. Orca Slicer: 0.16-0.64mm. Prusa sells the diameter but no layer figure for it appears in the Prusa sources compiled here |
| 1.0mm | 0.70-0.80mm | Orca Slicer: 0.20-0.80mm. Prusa's figures — usually 0.5mm, possible to go higher — come from a 2018 article covering the MK2/MK3 generation with E3D V6 hotends. Prusa's current Nextruder printers are offered in 0.25, 0.4, 0.6 and 0.8mm, and Prusa states any other diameter requires creating the PrusaSlicer profile manually. Bambu Lab does not offer 1.0mm. Check what your printer's manufacturer actually sells before planning around this row |
Every row of Orca Slicer's published table is exactly 20% and 80% of nozzle diameter. It is the percentage rule tabulated, not an independent measurement — useful mainly because it is the one source here that covers diameters Prusa and Bambu Lab do not.
On the 0.10mm floor: Prusa states that generally they do not suggest going lower than 0.10mm, because the improvement in print quality at 0.07 or 0.05mm is relatively minor while print times are significantly longer (published). That is a suggestion about diminishing returns, stated in an article whose worked examples use a 0.4mm nozzle, and Prusa does not say whether it is meant to apply to smaller nozzles. Bambu publishes 0.05-0.12mm for its 0.2mm nozzle (published), so do not carry the 0.10mm figure across to a fine-detail nozzle. Check what profiles your slicer already ships for that diameter instead.
Before you buy: does that nozzle fit your printer?
This is the step to take before any of the trade-offs below matter, and it is where money gets wasted. On Bambu Lab machines the nozzle is part of a printer-specific hotend assembly, and the wiki publishes a nozzle-to-printer compatibility table: the X1C Hotend fits the X1C only; the P1 Series Hotend fits the P1P and P1S; the A1 Series Hotend fits the A1 mini, A1 and A2L; the H2 Series/P2S Hotend fits the H2D, H2S, H2C, P2S and X2D; the E3D High Flow ObXidian Hotend fits the X1C, P1P and P1S; and the TPU Hotend fits the H2D and H2D Pro right hotend only (published). Bambu adds that while the A2L accepts quick-release nozzles from the whole lineup, performance improvements cannot be guaranteed and A-series nozzles should be used on it (published). A 0.6mm nozzle for one model does not fit another.
On a Prusa Nextruder machine, check whether the nozzle you want is a Prusa Nozzle or an E3D V6 nozzle. Prusa states that the Nextruder V6 Nozzle Adapter is what enables a Nextruder to accept E3D V6 nozzles (published). Prusa's Nextruder nozzle page is marked relevant for the MK4, XL, MK3.9 and CORE One families; the E3D V6 nozzle page is marked relevant for the MK4, XL, MK3.9, MK3.5 and MINI families (published). If you are on a machine from another manufacturer, the equivalent check is the same one: find your manufacturer's own hotend or nozzle compatibility page and confirm the part number, not the diameter.
What a larger nozzle actually buys you: time
Prusa states print times up to twice as fast with a 0.6mm nozzle compared to 0.4mm, and up to five times faster with a 1.0mm nozzle (published). Their worked example is a Voronoi lamp where the 0.6mm nozzle needed two perimeters where the 0.4mm needed three, cutting nearly nine hours off the print, with almost no quality sacrificed (published).
Prusa states that the two effects combine: a larger-diameter nozzle lays down wider perimeters so fewer are needed for a wall of the same thickness, and a larger nozzle also allows printing with increased layer height, and combining these two effects leads to a noticeably shorter print time (published). The vase case shows which effect disappears under which conditions — Prusa states that if you keep the same layer height and print something with just one perimeter, such as a vase, you will not notice any improvement in speed, because the nozzle goes through the same sequence of moves independent of diameter (published). Prusa does not state the layer height used for the Voronoi lamp, and does not say which of the two levers contributed more to the nine hours. The Bambu figures below are the independent evidence for what raising layer height alone is worth.
| Layer height | Published print time | Relative to 0.20mm (computed) |
|---|---|---|
| 0.08mm | 1h 19m | about 2.2 times as long |
| 0.20mm | 36m 14s | baseline |
| 0.28mm | 28m 27s | about 21% shorter |
The strength result, and how far to trust it
In Prusa's impact testing, objects printed with a 0.6mm nozzle absorbed up to 25.6% more energy than the same objects printed with a 0.4mm nozzle, and objects printed with a 0.25mm nozzle absorbed 3.6% less (published). The method was a Charpy impact strength test on ten samples, with the minimum and maximum values discarded, leaving eight (published).
Treat this as direction-informative only. It is one manufacturer's test, on their own geometry, with their own material, at settings they chose, and the magnitude should not be carried to your part. What supports the direction is that a second manufacturer describes the same effect independently: Bambu Lab's nozzle page attributes enhanced interlayer bonding and stronger parts to the 0.6mm nozzle, and lists reduced strength and lower interlayer adhesion as a drawback of its 0.2mm nozzle (published). Two manufacturers agreeing on the sign of an effect is worth more than either one's percentage.
What a larger nozzle costs you
Wider perimeters mean coarser horizontal detail. Prusa states that with a 0.4mm nozzle, parts of small printed letters can be lost during slicing even with thin wall detection enabled, and that a 0.25mm nozzle avoids this (published). That decision is exposed as a setting you can read before you buy. In PrusaSlicer, under Print Settings, Advanced, Arachne perimeter generator, Minimum feature size defines the thinnest feature that will be printed — anything thinner is not printed — and Minimum perimeter width is the width that replaces thin features above that threshold. Both can be expressed as a percentage of nozzle diameter, and Arachne has been the standard perimeter generator since PrusaSlicer 2.5.0 (published). If your part has fine detail, that is the field to check.
The other costs are stated by both makers: Bambu lists detail loss, visible layer lines and softer edges, poorer bridging and increased material consumption as drawbacks of the 0.6mm nozzle, and supports that are hard to remove and leave heavy surface marks for the 0.8mm (published). Prusa states that nozzle diameter directly affects support wall width, with 0.25mm supports extremely easy to remove and 1.0mm supports very difficult (published). Prusa adds a thermal cost that is easy to miss: the larger the nozzle diameter, the more solid material there is to cool down, which may increase warping, and this may be an issue for materials prone to warping such as ASA or PC Blend (published). Inference from those listed drawbacks: keeping the 0.4mm nozzle you already have, rather than replacing it, preserves the detail, bridging and support-removal behavior you would otherwise give up.
Diameter and material are two separate decisions
If you are buying a 0.6mm nozzle for speed, you are also choosing its material, and that choice is governed by the filament you run, not by the diameter. Bambu Lab lists two common materials — hardened steel for abrasive filaments with hard particles such as PA-CF, PLA-CF, PETG-CF, glow-in-the-dark and wood-filled, and stainless steel for non-abrasive general-purpose filaments including PLA, ABS, ASA, PETG, TPU and PVA (published). It also sells a tungsten carbide nozzle in 0.4, 0.6 and 0.8mm for the H2D, H2S, H2C, P2S and X2D, described as perfect for abrasive filament and as showing significantly less wear than hardened steel, rated to 350 degrees C (published) — so on those machines there are three options, not two. Prusa lists brass alongside several hardened types including ObXidian, hardened nickel-plated and DiamondBack, with brass for everyday non-abrasive printing and another material required for abrasive composites containing carbon fiber, glass or metal particles (published).
For E3D V6 nozzles — used natively on the MK3.5 and MINI families, and on Nextruder printers through the Nextruder V6 Nozzle Adapter — Prusa notes you may need to adjust printing settings and increase the hotend temperature by about 5 degrees C to print successfully with a hardened steel nozzle rather than brass (published). A material change can also mean a temperature change.
Which filament needs an abrasion-resistant nozzle, and what else changes when you switch materials, is covered on the printer limits guide. Choosing the filament in the first place, based on what the part has to survive, is on the filament selection guide.
What this page deliberately does not tell you
A user reported on 28 March 2023 that Bambu Studio would not accept 0.3mm on a 0.4mm nozzle and corrected it down to 0.28mm (published). A reply in the same thread noted the cap can be raised by editing the nozzle settings in the extruder tab (published). Whether your copy of Bambu Studio still enforces 0.28mm in 2026 is something to check rather than assume — type the value in and see. A further reply in that thread explained the cap as the motors and threads on the Z rods requiring layer heights of 0.28 or 0.32 rather than 0.30, so-called magic numbers (observed as a forum claim). We are not repeating that as fact, because we could not find it in any manufacturer document, specification or firmware note. What is documented is the enforced limit itself. Treat any mechanical explanation you read for it as unverified until a manufacturer publishes one.
Check it on your own equipment
These take you to the manufacturers and standards bodies the page draws on, so you can look up your exact model.
- Official support page
Prusa Knowledge Base: Creating profiles for different nozzles (opens in a new tab)The 70-80% maximum with its stated consequence for layer adhesion, the Configuration Wizard route for loading Prusa's ready-made nozzle profiles, and the extrusion width guidance — 110% of nozzle diameter, or 1.125x derived automatically if you enter 0. — help.prusa3d.com - Manufacturer specification
Bambu Lab Wiki: Introduction to Bambu Nozzles (opens in a new tab)The nozzle-to-printer compatibility table naming which hotend assembly fits which Bambu model — check this before ordering — plus per-diameter layer height ranges for 0.2 to 0.8mm, the drawbacks listed for each, and the nozzle materials table including the tungsten carbide option. — wiki.bambulab.com - Manufacturer specification
Prusa Knowledge Base: Nozzle types for Nextruder printers (opens in a new tab)Which nozzle materials Prusa offers for Nextruder machines and a nozzle-size-versus-filament compatibility grid, the note that E3D V6 nozzles need the Nextruder V6 Nozzle Adapter, how to read a nozzle's diameter from its dot code, and the warnings about flexibles and composites at 0.25mm and warping at larger diameters. It does not list which materials come in which diameters. — help.prusa3d.com - Official support page
OrcaSlicer Wiki: Layer Height Settings (opens in a new tab)The 20-80% rule and a per-diameter min/max/first-layer table covering 0.2 through 1.0mm — the reference to use if your printer is not a Prusa or a Bambu Lab, since Orca and its forks ship with many other machines. — github.com
What this page does not tell you
- Every number here is attributed to the document it came from. Where arithmetic was performed, the text or table caption says so and the result is labeled computed or inferred.
- The 25.6% and 3.6% impact figures are one manufacturer's Charpy test on their own geometry and material. They indicate the direction of the effect, not a magnitude you can expect on your part.
- The print-time table reflects one model printed by one manufacturer on one machine. Your model's geometry, perimeter count and speed settings will change the ratios.
- The flow-rate worked example uses a rectangular approximation of the extrusion cross-section, which runs slightly high because a real extrusion has rounded edges. The 10 mm3/s figure is for an E3D V6 specifically, quoted by a forum moderator who states no affiliation with Prusa Research; your hotend's maximum will differ and most manufacturers do not publish it prominently. Treat it as an order of magnitude and a reason to check, not a specification for your machine.
- No source compiled here links exceeding a hotend's melt rate to plastic leaking from the hotend assembly. In the one thread where both subjects appear, the leak is attributed to a loose nozzle and the melt-rate figure answers a different question. If your hotend is leaking, treat it as a mechanical fault and follow your manufacturer's nozzle-installation procedure rather than changing slicer settings.
- Prusa's per-diameter maximums of 0.48mm and 0.5mm come from a 2018 article covering the MK2/MK3 generation with E3D V6 hotends. Its own comment thread shows shipped profiles using lower caps. Prefer what your current slicer version enforces.
- The 0.25mm and 1.0mm table rows are thinner than the others. No layer-height figure for a 0.25mm nozzle was found in the Prusa sources compiled here, Orca's table has no 0.25mm row, and Prusa's current Nextruder machines are not offered in 1.0mm.
- This page compiles Prusa, Bambu Lab and Orca Slicer because all three publish specific, checkable figures. No UltiMaker Cura documentation was opened for this page, so Cura-specific menu paths are not given. If you are on a Creality, Elegoo, Anycubic, Sovol or Qidi machine, your slicer is most often an Orca fork, and the Orca reference linked below is the closest applicable document. Your machine's own profile remains the authority for your machine.
- Compatibility here is limited to what Bambu Lab and Prusa publish for their own hardware. No general rule about nozzle threads or hotend interchangeability across brands is offered, because none was sourced.
Sources
Manufacturers revise specifications. Every source below is dated — open it before you buy.
- Prusa states layer height should be below 80% of nozzle diameter, giving about 0.32mm as the maximum for a 0.4mm nozzle.
- PrusaSlicer displays an error message if a layer height greater than the nozzle diameter is entered.
- Original Prusa print profiles always use 0.20mm as the first layer height, which is a different setting from the layer height used for the rest of the print.
- Prusa suggests not going lower than 0.10mm, on the grounds that the print quality improvement at 0.07 or 0.05mm layers is relatively minor with significantly longer print times. The wording is a general suggestion, and the article's worked examples use a 0.4mm nozzle.
- Prusa states that layer height should be 70-80% of nozzle diameter at maximum, otherwise layer adhesion will be significantly compromised.
- Prusa states that setting up the extrusion width is the most important thing when creating a profile for a new nozzle, that extrusion width should generally be about 110% of nozzle diameter, and that entering 0 makes PrusaSlicer derive 1.125 times nozzle diameter.
- Prusa states that Original Prusa printers in PrusaSlicer have built-in profiles for a variety of nozzle sizes, imported through Configuration, Configuration Wizard, Prusa FFF by ticking the boxes for the profiles wanted.
- Prusa's article on running different nozzle diameters on different extruders opens by describing it as an experimental workflow that requires tweaking several settings in profiles, with some nozzle combinations possibly incompatible and potentially causing unsuccessful prints. It is filed under multi-material slicing.
- That same Prusa article instructs setting nozzle diameter per extruder in the Printers tab, Extruder #, and highly recommends changing the minimum and maximum layer height limits for the corresponding extruders.
- Bambu Lab states the reasonable range of layer height is 20% to 70% of nozzle diameter, giving 0.08mm to 0.28mm for a 0.4mm nozzle, and that the limit for the current nozzle is visible under printer settings, extruder.
- Bambu Lab states that when layer height is set relatively high the extrusion flow rate is relatively large and a slower printing speed is required for the hot end to fully melt the extruded filament, and that its 0.08mm, 0.20mm and 0.28mm presets carry different default print speeds.
- Bambu Studio system presets set first layer height to 50% of nozzle diameter, giving a default first layer height of 0.2mm on a 0.4mm nozzle.
- Bambu Lab publishes print times for the Glowing Ghosts model on a 0.4mm nozzle of 1h 19m at 0.08mm, 36m 14s at 0.2mm and 28m 27s at 0.28mm layer height.
- Relative to the 0.20mm baseline in Bambu Lab's published example, 0.08mm takes about 2.2 times as long and 0.28mm takes about 21% less time.
- On Bambu Lab's variable layer height page, the 0.08-0.28mm range for a 0.4mm nozzle is described as a range from their laboratory testing for better print quality, with the advice not to modify it.
- Bambu Lab's nozzle page states layer heights of 0.05-0.12mm (25-60% of nozzle diameter) for the 0.2mm nozzle, 0.1-0.3mm (25-75%) with 0.2mm standard for 0.4mm, 0.15-0.45mm (25-75%) with 0.3-0.4mm common for 0.6mm, and 0.2-0.6mm (25-75%) with 0.4-0.5mm typical for 0.8mm.
- Bambu Lab publishes a nozzle-to-printer compatibility table: X1C Hotend fits X1C; P1 Series Hotend fits P1P and P1S; A1 Series Hotend fits A1 mini, A1 and A2L; H2 Series/P2S Hotend fits H2D, H2S, H2C, P2S and X2D; E3D High Flow ObXidian Hotend fits X1C, P1P and P1S; TPU Hotend fits H2D and H2D Pro right hotend.
- Bambu Lab states that while the A2L supports the quick-release nozzle from its entire printer lineup, performance improvements cannot be guaranteed and A-series nozzles should be used for printing with the A2L.
- Bambu Lab states there are two common materials for nozzles: hardened steel for any abrasive filaments with hard particles such as PA-CF, PLA-CF, PETG-CF, glow-in-the-dark and wood, and stainless steel for most non-abrasive general-purpose filaments such as PLA, ABS, ASA, PETG, TPU and PVA.
- Bambu Lab also sells a tungsten carbide nozzle in 0.4, 0.6 and 0.8mm, compatible with the H2D (both hotends), H2S, H2C (left hotend), P2S and X2D, rated to 350 degrees C, described as perfect for abrasive filament and as showing significantly less wear than hardened steel.
- Bambu Lab attributes enhanced interlayer bonding and stronger parts to the 0.6mm nozzle, and lists reduced strength from fine lines lowering interlayer adhesion as a drawback of the 0.2mm nozzle.
- Bambu Lab lists detail loss, visible layer lines and softer edges, poorer bridging and increased material consumption as drawbacks of the 0.6mm nozzle, and supports that are hard to remove and leave heavy surface marks as a drawback of the 0.8mm nozzle.
- Bambu Lab states nozzle diameters are typically available in four sizes: 0.2, 0.4, 0.6 and 0.8mm. No 1.0mm nozzle appears in its table.
- Orca Slicer's documentation states the optimal range for layer height is between 20% and 80% of nozzle diameter, and that over 80% there is increased risk of layer adhesion issues and reduced print quality.
- Orca Slicer's documentation publishes a per-diameter min/max/first-layer table: 0.2mm nozzle 0.04-0.16mm; 0.3mm 0.06-0.24mm; 0.4mm 0.08-0.32mm with 0.25mm first layer; 0.5mm 0.10-0.40mm; 0.6mm 0.12-0.48mm; 0.8mm 0.16-0.64mm; 1.0mm 0.20-0.80mm.
- Every row of Orca Slicer's published min/max table is exactly 20% and 80% of the nozzle diameter, so the table is the percentage rule tabulated rather than an independent measurement.
- Computed 70-80% ceiling bands are 0.14-0.16mm for a 0.2mm nozzle, 0.175-0.20mm for 0.25mm, 0.28-0.32mm for 0.4mm, 0.42-0.48mm for 0.6mm, 0.56-0.64mm for 0.8mm and 0.70-0.80mm for 1.0mm.
- Prusa states print times up to twice as fast with a 0.6mm nozzle compared to 0.4mm, and up to five times faster with a 1.0mm nozzle.
- On a Voronoi lamp, a 0.6mm nozzle needed two perimeters where a 0.4mm nozzle needed three, cutting print time by nearly nine hours with almost no quality sacrificed. The article does not state the layer height used for that example.
- Prusa states that a larger-diameter nozzle lays down wider perimeters so fewer are needed, that a larger nozzle also allows printing with increased layer height, and that combining these two effects leads to a noticeably shorter print time.
- Prusa states that if you keep the same layer height and print something with just one perimeter, such as a vase, you will not notice any improvement in speed, because the nozzle goes through the same sequence of moves independent of diameter.
- In Prusa's impact testing, objects printed with a 0.6mm nozzle absorbed up to 25.6% more energy than those printed with a 0.4mm nozzle, and objects printed with a 0.25mm nozzle absorbed 3.6% less. The method was a Charpy impact strength test on ten samples with minimum and maximum removed, leaving eight.
- With a 0.4mm nozzle, parts of small printed letters can be lost during slicing even with thin wall detection enabled, while a 0.25mm nozzle avoids this.
- Prusa states nozzle diameter directly affects support wall width, with 0.25mm supports extremely easy to remove and 1.0mm supports very difficult to remove.
- Prusa states a 1.0mm nozzle is usually run at a 0.5mm layer height and that it is possible to go higher. This is from a 2018 article covering the MK2/MK3 generation with E3D V6 hotends.
- Prusa states a 0.6mm nozzle can achieve up to a 0.48mm layer height, in the same 2018 article.
- In a reader comment dated 15 June 2018, the MK2 0.6mm profile was reported to cap maximum layer height at 0.35 rather than 0.48; on 20 June 2018 Prusa staff member Mikolas Zuza replied that this limit is for the variable layer height function, that it can be raised, and that the default values are rather conservative so most users need not change anything.
- The layer-height limit a slicer enforces is a profile setting chosen with safety margin rather than a physical limit, which is why it can sit below the manufacturer's published percentage rule and can be edited.
- A Prusa staff member states that the main thing that changes with a different nozzle is the extrusion width, and that generally it should be about 110% of nozzle diameter.
- A Prusa staff member states that with really big nozzles, 0.8mm and above, you may want to either slow down to let the plastic get properly heated, or increase the temperature a bit.
- In a 2017 Prusa forum thread, a moderator states that the E3D V6 has a maximum melt volume of just over 10 mm3/s, or just over 4 linear mm of 1.75mm filament. He gives the figure while answering the general question about acceptable layer height ranges, not as an explanation of the leak the thread opens with.
- In that same 2017 thread, the original poster's hotend leaked plastic between the hotend and the radiator after a Simplify3D first-layer-multiplier bug produced a 2mm raft layer on a 0.4mm nozzle. The moderator attributed the leak to a wrongly installed nozzle and instructed heating to 250-260 degrees C and tightening the nozzle with spanners on both nozzle and heat block; another member stated the only reason a nozzle leaks is that it is loose and that it has nothing to do with slicer settings.
- In that 2017 thread, one user described 50% of nozzle diameter as finished quality and up to 80% as workable for draft prints, and a moderator gave a range of about 20% to 75 or 80% of nozzle diameter. That moderator's signature states he has no affiliation with Prusa Research.
- Raising layer height from 0.20mm to 0.28mm on a 0.4mm nozzle at a constant 100mm/s, with extrusion width at Prusa's recommended 110% of nozzle diameter, takes estimated volumetric flow from about 8.8 mm3/s to about 12.3 mm3/s, crossing the just-over-10 mm3/s figure quoted for an E3D V6.
- A Bambu Lab forum user reported on 28 March 2023 that Bambu Studio would not accept a 0.3mm layer height on a 0.4mm nozzle and corrected it down to 0.28mm; a reply the same day noted the cap can be raised by editing the nozzle settings in the extruder tab.
- A reply in that thread explains the cap as the motors and threads on the Z rods requiring layer heights of 0.28 or 0.32 rather than 0.30, described as magic numbers. This is a user claim; no manufacturer document supporting it was found, and this page does not repeat it as fact.
- Prusa states that the Nextruder V6 Nozzle Adapter enables a Prusa printer's Nextruder to accept E3D V6 nozzles.
- Prusa states nozzle diameter can be identified by the number of dots, or a marked number, around the rim of the nozzle, and that non-E3D Prusa Nozzles carry a marking on their metal tube that reads their size.
- Prusa's Nextruder nozzle page covers 0.25, 0.4, 0.6 and 0.8mm sizes and states that using a nozzle with a different diameter from the ones that have a PrusaSlicer preset requires creating the profile in PrusaSlicer manually. The page is marked relevant for the MK4, XL, MK3.9 and CORE One families.
- Prusa states that flexible materials can be problematic on a smaller diameter nozzle due to the higher pressure required for extrusion, and that composite materials are out of the question at 0.25mm.
- Prusa states that with a larger nozzle diameter there is more solid material to cool down, which may increase warping, and that this may be an issue for materials prone to warping during print such as ASA or PC Blend.
- Prusa lists nozzle types for Nextruder printers including Prusa Nozzle Brass, Brass CHT, High Flow Brass, ObXidian hardened steel, Hardened Nickel Plated, High Flow ObXidian and DiamondBack, noting abrasive filaments require a nozzle made of a material other than brass.
- Prusa's E3D V6 nozzles page is marked relevant for the MK4, XL, MK3.9, MK3.5 and MINI families, and states you may need to adjust printing settings and increase the hotend temperature by about 5 degrees C to print successfully with a hardened steel nozzle.
- In PrusaSlicer, Minimum feature size defines the thinnest feature that will be printed and anything thinner is not printed; Minimum perimeter width is the width that replaces thin features above that threshold. Both can be expressed in millimeters or as a percentage of nozzle diameter, under Print Settings, Advanced, Arachne perimeter generator. Arachne has been the standard perimeter generator since PrusaSlicer 2.5.0.
- Keeping a 0.4mm nozzle rather than replacing it preserves the detail resolution, bridging performance and support-removal behavior that both manufacturers list as drawbacks of larger diameters.