1piece High Temperature Sharp Hardened Tool Steel MK8 Nozzles 0.4mm for 1.75mm Makerbot, Creality CR-10 All Metal Hotend, Ender 3/ Ender3 pro, CraftBot, Prusa i3 3D Printer

works better then the cheap brass one i tried first.

I've had this nozzle a while it's held up perfectly but an issue I'm running into is now is that the size of the nozzle isn't on the nozzle anywhere. I had to come to my Amazon order history to confirm that I ordered a .4mm. Maybe I could eyeball it against another .4mm brass nozzle but that's not great. Currently this is the only hardened nozzle I own but that will be changing soon. I'll have to be sure that my next nozzle has the size on it so I can at least use process of elimination to identify this one as the .4

I recently purchased this nozzle with the intent of using it for printing heavier materials and lasting longer, which I believe is what draw a lot of others to this nozzle. When using regular brass nozzles, heavier materials such as carbon fiber and wood will wear the nozzle down more rapidly to the point where you will likely need to replace it often (roughly every 1-4 weeks depending on how frequently you print). The drawback to going with a steel nozzle is that you will usually need to adjust your print temperatures by roughly 10c to be able to print with the same materials. Unfortunately, increasing temperature 15c or even 20c wasn't enough to work in this case, even on a fully upgraded CR10. When the material was starting to come out evenly, my extruder (a BMG) was having difficulty pushing materials through, often causing them to get backed up and my extruder to slowly give out. I practically had to push the door in firmly and hold it in to put enough pressure on it to push the material though evenly.I will state though that when I switched to regular PLA it seemed to work pretty well with no issues, but if you aren't able to print tougher materials easily then what's the point of purchasing this item? That point more or less undermines one of the main purposes of upgrading to a steel nozzle, though I would imagine that it would at least last a bit longer than a brass nozzle for printing regular PLA.Overall I'd give this a 2.5, rounded up to a 3.

I got these nozzles to print some carbon-fiber-impregnated filament, since they're hard enough to not be worn out by the embedded fibers. I put one of them in the printer, leveled the bed, and did a print with regular PLA. The quality (with the exact same settings) was noticeably poorer, with a rough finish. The nozzle seemed to do some kind of weird "dribble" with the filament, instead of letting it come out in a smooth stream. I slowed the print speed down and the dribbling effect was less severe. However, I was able to easily crush the printed object in my hand, where the same print with the brass nozzle was strong enough that I could barely bend it. I tried a few other prints and wasn't able to get decent print quality. Thinking I may have messed up my printer somehow, I put the brass nozzle back in and leveled the bed. It's printing with that nozzle right now, and the quality of the print looks good. Filament is flowing smoothly, and the print doesn't have a bunch of weird little "boogers" and other crap on it like it did using the hardened nozzle. I may be doing something incorrectly, but I don't know what that might be.

Took me a few days to dial this nozzle in, but once I did I had no issues whatsoever; I was actually able to get better print quality out of this than a brass nozzle (Managed to pull off some near-SLA quality details on a miniature with the 0.4 mm which is pretty astonishing). That being said, I had to bump my PLA from 205 up to 220, and had to go all the way to 260C for PETG.Works like a charm with the half-kilo or so of carbon fiber PLA I've printed, however.Overall, this is definitely worth the $6 if you're looking to print something more abrasive; just be ready for a big temperature increase.

Fits perfect. Easy to install. Quality is top notch, very durable. Can't do much better for a nozzle that will last a long time.

With the original ender 3d printer ....it's a must have upgrade

Junk. Keeps clogging no matter what material or setting I tried..tossed it. Lesson learned.Update 2/8/21.. so after some more testing(I'm a noob), and after I stopped whining..I have managed to get some pretty good prints with this nozzle. I've only used it with TPU filament thus far, but bought with intent to use carbon fiber through it.In the end, I would say it's a good value.

I do not have access to hardness testing files, however, I can tell you that when using a standard "fine" file, these nozzles have the characteristic harness (sounds high pitch and feels like the file is just skating over the surface rather than "biting") that one would expect when lightly filing a hardened steel object. I hope to get a lot of use from these nozzles!

Great nozzle well made and works a treat

Excelente boquilla ... hasta el momento en que cambie el hotend jajaja ya que su rosca es muy corta y en el nuevo deja un gap entre la rosca de la boquilla y la rosca de la garganta.. por lo que supongo que ya no podra usarse ... requeriré una v6

acheté 2 buses, pour imprimer avec filament fibre de carbone, avec une ender 3 V2.le résultat est vraiment vraiment superbe. de très belles pièces, très bonne précision.je recommande, il; vaut mieux investir plutôt que d'acheter des buses à pas cher !!

apres installe j'ai eu des fuite de filament , et impossible a corriger . Elle a fini a la poubelle