Tungsten Carbide RepRap M6 Nozzle

I bought this nozzle to use with abrasive filaments, and plan to use it full time in my Prusa i3 MK3s. The product appeared well made, decent surface finish for tungsten carbide. All profiles used with my 0.4mm brass nozzle work great with this, and the print quality is equal if not better. Shipping to the US was fast and easy. I would not hesitate to shop with Spool3D again.

The idea is great and the M6 nozzle perform like a champ. The only problem is it loosen after a couple of prints. No matter how hard I tighten this thing at a temperature of 280C. I bought cheap brass nozzle and now everything is working perfectly. The thread on my tungsten nozzle is .005" smaller than other nozzles. By the way it is not even in the tolerance range of a M6 x 1 thread major diameter. I also bought the MK8 version and this one was even more terrible, There was a problem of under extruding. I also went back to a brass nozzle, and everything is working back to normal. UPDATE: After reaching out the spool3D customer support, they asked me to send back the faulty item and sent me a new one. I have been using the new nozzle since. I am printing glow in the dark and carbon fiber PETG without worrying about the wear. It is printing flawlessly. Thank you very much for the replacement and the fast response.

Really happy with this. After a lot of printing I can say it prints very well. No need to retune profiles, it works just as well as brass. Handles carbon fiber infused filament. Machining on the inside of the nozzle looked really good, couple really tiny burrs but nothing that would be a problem. I had to re-tighten mine 3 times before it stopped leaking, might just need more torque versus a brass nozzle. Has been working well since then.

Finally! A robust* nozzle that I can seamlessly use to switch between abrasive and non abrasive filament, without having to worry about which print profile I am using. I love that all my brass profiles work perfectly without changing anything and I still get the same layer adhesion as I would with using the brass nozzle. This was not the case with using a couple of the other more popular hardened steel nozzles. So far I couldn't be more happy with the results. *I only have put a few CF-PETG parts through it so far but given its material should be very robust.

This is the nozzle of my dreams, good thermal conductivity (good as brass), extreme hardness (as hard as ruby), features one-piece-construction, all with a fair price tag. It looks really good too, the photos do not do this nozzle justice. The only (non)-issue is that the threads are a very slightly looser fit. However, that does not impact performance in any way. This is the only nozzle you will ever need.

I recommend this tungsten carbide highly. It mechanically matches an E3D brass nozzle close enough that only Live-Z needs to be adjusted. No PINDA repositioning necessary as opposed to a nozzle that is too long or short. Its filament inlet has a small chamfer similar to a E3D brass nozzle. One piece construction means I don't worry about it coming apart or having any portion of it composed of lower conductance steel. Thermal conductivity is excellent. On the print-fan finicky Mosquito hotend, a hardened vanadium steel nozzle would require a 20 to 30C boost in nozzle temperature to achieve almost brass equivalent filament melt. The Spool3D tungsten carbide nozzle solves that issue completely. I can use my normal brass nozzle print profiles once more. This nozzle provides both abrasion resistance AND good thermal conductance making it both durable AND capable of printing well. I will not go back to a low conductance, hardened steel nozzle after using tungsten carbide.

Early days yet, but nozzle installed easily on my Prusa Mk3S. I’ve printed a few models with carbon fibre reinforced nylon with excellent results. Bodes well for the future. Fast delivery from Spool 3D from Canada to Australia.

I personally believe this is the best nozzle available anywhere. The flow is super consistent, it heats like a brass nozzle and it will literally last forever. It is the last nozzle you will ever have to buy. Buy this and an E3D pro silicone sock and you'll be set until you need another one for your next printer.

Works great, Had to turn down temps (normally have hardened steel). I hope to see a .25 nozzle in Tungsten Carbide too.