Tungsten M6 Extruder Nozzle for 3D Printers - Includes 0.4mm Diameter Nozzles for Precise and Versatile Printing

Update 01/08/2024: still going strong! Never had to replace this nozzle and I’ve put over 900 hours of printing on it. It looks good as new. My Bambu Lab printer has received a few firmware updates since my original review below and the printer no longer shows the error message I used to receive. These nozzles are A+ highly recommended.- - -I’m having a great experience using this nozzle on my Bambu X1C. It does cause an error message on the printer that I simply ignore. Bambu Lab doesn’t provide the end user the option to change the stored value of the nozzle height. You’re supposed to use the official Bambu Lab hotend nozzles. Everything prints fine. I hope to buy all the nozzle sizes from Midwest Tungsten Service soon.

Seems to be printing very well and at 15C lower temperature than I was with the A2 nozzle. I'm still dialing it in but where I had extrusion problems at 60mm/s with the a2 nozzle, this does it without a hitch. In all fairness though I've also gone from an aluminum to copper block.Build quality is excellent. I'm not sure if their pictures just suck or if they shot a low quality part and never updated it. I have no idea what printer convention this is designed for but comes close to a MK8 nozzle. Dimensions are in my pictures if it helps. Surface is smooth and the downhole finish appears to be as good as the exterior.Hardness is high enough that a file that can cut a micro swiss A2 nozzle skates off of this. Given what I know of tungsten alloys that probably puts this nozzle around RC 66 vs the A2 at around 58 (assuming air quench and temper).Thermal conductivity of this is the big selling point though since it comes in at 173 W/(m*K) which crushes the A2 at 26 W/(m*K), brass at 109 W/(m*K), ruby at 35 W/(m*K) and stainless at 7-26 W/(m*K) (depending on the alloy). This means only copper and aluminum really beat it on this point and they are far too soft for composite materials. Since the TC nozzles seem to be vaporware or endless kickstarter failures, this is probably the best nozzle for composite materials available currently.

I rarely leave any review on Amazon, but this nozzle I received clogs terribly and doesn't work well. In the image, the right one is the one I received from this listing, and the left one I got from a different source after I couldn't get this one working.- The left one works really well. I can print down at 185C and it prints smoothly. No clog, amazing print on Ender 3.- The right one (this item) requires 210C to even have a smooth print, which shouldn't be the case for Tungsten. Even my brass nozzle can print amazingly well at 190C. It behaves more like a steel nozzle to me?Also, the item I received doesn't look like the one from the others' reviewer. Did I receive a fake? If the merchant reaches out to me and correct the mistake, I'll consider revising this review. For now, it's a one star.Update: I tried to test it by scratching it using my Knipex plier. It scratches (see the second photo). This is definitely not Tungsten. There is no way a plier should be able to scratch a genuine one.

I have this nozzle on my Prusa I3 MK3. Didn't even last through 1 kg of cf filament. I had to keep dropping my z offset for every print. Last print took off .124 mm of nozzle length. Verified with calipers after adjusting z offset. Don't think this nozzle is tungsten if its wearing that fast. I have used E3D hardened and Microswiss nozzles on my MK2 and Creality CR10S4 and had them last longer than this thing. I do not recommend it if this is the wear quality it has.It does heat up nicely compared to other hard nozzles. Might be a good nozzle to last forever if you don't plan on printing abrasives.**UPDATE TO REVIEW**Seller is sending a replacement nozzle. Updating from one star to three for customer service. Will update review after testing replacement.**UPDATE TO THE UPDATEReceived a new nozzle. Since it was replaced so quickly I updated back to 5 stars. Will do a followup after testing.**UPDATING AGAIN**Replacement nozzle is holding up great. Ran 2.7 kilos through it and no problems. Seller has asked I send back the bad one. Need to do that so they can see what went wrong. The replacement nozzle is shorter than the first nozzle too. Over all, very pleased with the nozzle and willing to overlook the experiance as they fixed it quickly.

The nozzle’s temperatures are really good, just getting a bit of under-extrusion. I am trying to get to the bottom of this issue, but could be due to the nozzle diameter being slightly smaller than the advertised 0.4mm?Update: prints seem to have fixed themselves, this nozzle is all good! Guess you just have to give it a little bit which is weird.

I've been using this nozzle for a few weeks now and have been printing a variety of filaments (PLA, PETG, Abrasive PLA). The nozzle works like a dream when you first start, and the notion of never having to replace the nozzle is very attractive. The thermal properties are damn amazing.Unfortunately, things can go south unexpectedly, and very quickly due to partial clogs; this happens even when you do a full purge of any previous mixed filament and cleaning out the nozzle with an acupuncture needle, or perform a cold pull cleaning operation. Clogging happens even when using high quality filament (prusament). Eventually, this causes partial buildup and eventual release of filament on your print in the form of a blob (under extrusion, then sudden over extrusion). Depending on the size of the blob, your print may be ruined or even ripped off the build surface.For that reason, you basically can't use this nozzle for extended periods of time or in an unattended fashion; so any really big prints or overnight prints are a no-go. I've wasted so much filament trying to print medium sized objects, where using the same gcode + a brass nozzle succeeds without issue.I'll keep the nozzle and use it for dedicated "glow-in-the dark" PLA prints, but the dream of having one nozzle that lasts forever that can print most every kind of filament is dead.

Conducts heat very well and very tough. Got clean prints from ABS and cF-PA over and over. Definitely recommended.