Tungsten Carbide RepRap M6 Nozzle

DONT EVEN BOTHER USING WITH THE STOCK HEAT BLOCK ON PRUSA MK3S+. As others have pointed out here as well as many other sites including reddit, you must use a plated copper heatblock with this nozzle or it WILL loosen off after a day of printing even when torqued properly. Spool3d should include this information or similar in the description even if "mines working just fine" or what have you. If the failure rate is this high there is a functional problem of thermal expansion of metals between the stock aluminum V6 block on the mk3s. That being said. It seems to be working now and that's cool (got a plated copper heat block on the stock heatbreak). 5 stars for nozzle 2.5 stars for dissemination of technical information

While the idea of this nozzle is fantastic, and the nozzle itself seems great, it just will not stay tight on my stock aluminum E3D heater block on a stock Prusa i3. It'll be great for maybe 5-10 prints but then it will have loosened itself enough that filament starts leaking up the top of the heating block and burnt filament dribbles down in blobs randomly into your print, making things a mess. (It also doesn't help that, having loosened itself, it will have messed up your carefully calibrated base Z layer offset). I can go back and re-tighten it to 3Nm (and recalibrate the base layer), and it'll work for a while again, but after a few days the dreaded blobs of burnt gunk start showing up to ruin my prints again. There are lots of reports of this happening with tungsten carbide nozzles, unfortunately (in general: not just this one): the leading hypothesis seems to be that the thermal expansion properties of tungsten carbide and aluminum are too dissimilar for it to stay tight. People with copper blocks (like the E3D plated copper block, also sold here) seem to have much less trouble. So if you have a stock E3D heat block (which is what a Prusa i3 comes with) either stay away from this nozzle, or also upgrade your heater block at the same time.

I use tungsten carbide nozzles on all my Prusa printers and haven't had any problems with the Spool3D brand. Unlike other brands, it's solid tungsten carbide, not an alloy, and not just the tip. And unlike hardened steel I never had to change any of my print profiles, the thermal properties are very close to brass or coated copper. Spool3D seems to be the only manufacturer covering a broad spectrum of TC nozzle sizes. The nozzles are not cheap, especially if you factor in shipping to the U.S., but (I hope) they'll last forever.

The thermal specs of this nozzle were worse than hardened steel. It is supposed to be similar to brass. Carbon fibre prints failed so I ran some tests with PLA. Brass nozzle 210C had great layer adhesion and printing. Hardened steel nozzle 215C had good prints. Tungsten carbide nozzle: 210C extruder grinds filament after a couple layers, 215C no layer adhesion, 220C layers adhering but still weaker than normal, 225C good print. Put the brass nozzle back on and 210C had perfect prints again. This TC nozzle did not live up to its specifications.

Solid product, prints at temps same as brass nozzles. Inside is not as polished but that’s because carbide is though to work with. For such price it should have come in nice metal box in foam like Phaetus recently introduced carbide nozzles (they only have a carbide tip like Dyzedesign), not in a plastic bag. Shipping to europe is crazy expensive, coming in bubble envelope. Guys, you should really work more on presentation of a product and do something with shipping as it definitely doesn’t cost that much via regular post.

Perfect with spool3d carbon fiber

I've only had it for a week (after being held up by Fedex at the Canadian/US Border for two weeks...). But so far it's performing great. Excellent prints with my Prusa Mk3S+ using standard profiles, no need for adjustments.

I've got around 50-100 hours of use with abrasive filaments on this nozzle and it has performed wonderfully, and consistently. Brass nozzles would require swapping every 20-40 hours or so on the same filament. Having used both this and the Dyze design tungsten carbide nozzle, this one is superior, because it is made of tungsten carbide all the way through, whereas the Dyze design version has a steel housing with just a tungsten carbide tip. This means the Spool3D tungsten carbide nozzle has better thermal conductivity performance which rivals brass and wont require you to change print temps to compensate for a steel or steel-core nozzle. Of course the shipping price stinks, hopefully they can do something about that! Excellent product.

20$ shipping and VAT appearently was not included so had to pay an additional 20$ to receive it (TOTAL SCAM, 40$ for a 3g package, costs 3$ with a simple tracked letter). I make thousands of orders and taxes are always covered by the seller Do not buy if you don't want to get ripped off, just get the olson ruby from prusa website.

Prusa I3 Mk3S, swapped with stock nozzle, Same Z calibration setting. Did not need to change anything. Printing 3DXTech CarbonX Carbon Fiber PETG Filament without any problems. Using PrusaSlicer Prusament PETG settings.