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

First nozzle wore out after 1/2 a roll of filament. I decided to get a good look of my second and the machined surfaces are jagged and terrible. This is also not a good hardened steel, a file eats right through it. Took a close up picture of an un used second, and it looks horrible.

I received a nozzle with 3 dots on it like the listing says for the .4mm. However the nozzle is far smaller than even my .2mm nozzles. I didnt notice and ended up having to spend a long time unclogging my machine. Im going to shop on ebay for now on for nozzles since this isnt the first time I received the wrong size.

The first minute or two comes out fine, but then it just stops. I dont know if its because the nozzle isnt optimize to hold heat, our maybe printing PLA over 220°C+ isnt enough. This review wants me to address sheerness whatever that means, but I cant really give an answer on that if I cant get a print at all.

Really last long and is good for materials that are rough, but it needs to run at higher temps.

I got these nozzles to print some carbon-fiber-impregnated filament, since theyre 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 wasnt 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. Its printing with that nozzle right now, and the quality of the print looks good. Filament is flowing smoothly, and the print doesnt 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 dont know what that might be.

These work great!

So far Ive printed a 2KG of Carbon Fiber PLA and 1KG of Wood PLA with no wear to the nozzle, its impressed me so much I returned and bought 6 more nozzles to keep around and hand out to other friends.

Seems to work better than other harden nozzles, for me at least. Prints are sticking good and smooth. Stays sharp for a while, at least 1 week continuous printing with various PLAs like wood, carbon fiber, pla+. Have not tried other materials yet, but will soon. Overall this is good priced and works great

The nozzle is too short. It sits too deep into the nozzle assembly, and you cant get the wrench on it to tighten down.

Perfect to use for harder materials that will eventually wear out your stock tips over time