I am developing a ultra durable #3dprinting nozzle and i am looking for some feedback. After printing 5kg of various abrasive filaments I have seen no measurable wear to the nozzle.
Both the new and the use nozzle measure 0.45mm
The nozzle is made with jewel in the tip to make it wear resistant. One of the pictures you can see a hair i put next to nozzle opening for scale. Please comment on this if you are interested or have some feed back on this new product. My website explains more about how it works and the concept for the production version. http://www.dura-gem.com #startup
So you’re the developer for this? I actually had a question; what’s to keep the ‘gem’ from popping out of the front? There doesn’t look to be any kind of lip for it to hang onto.
Also, is this conforming to some “standard”? Is it meant to fit an E3D? A custom hot end of your own design? Maybe a hexagon, or ubis?
I’m guessing the gem is a tapered fit inside the nozzle and the barrel holds it in place.
@ThantiK @Neil_Darlow the gem is brazed into place in a vacuum furnace. I tried epoxy but the gem popped out under the extrusion pressure. The picture is the prototype and it is made to fit E3Dv6. The production version will be made to adapt to most 3D printers.
@Jonathan_Hurst looks interesting. Any idea what the price will be?
@Jonathan_Hurst , brazed? What happens when we want to print a material at 400C? Is there a risk of the jewel falling out?
@Rien_Stouten you may need to sit down for this 
it will retail for ~$75 for tip
~$90 for tip plus adapter to fit your printer
if i can sell more than 500 the price will come down. I am going to have a kickstarter with early adopter pricing. what do you think of the price?
I think I will pass.
@ThantiK it is brazed at 900C … there will be no issues at 400C
@Rien_Stouten its not for everyone… it is meant to be a premium product for people that are tired of throw away parts. It was originally designed to prevent wear in nozzles but i have a feeling that the low friction properties help with other aspects of 3D printing. that is part of what i need to quantify.
@Jonathan_Hurst I might consider buying one if it solved the problem with PETG sticking to the nozzle.
@Rien_Stouten what brand of PETG should try out? Let me know what you use and I will test it.
@Jonathan_Hurst Esun PETG.
@Jonathan_Hurst , you’ve noticed that the gem used disallows filament sticking to the nozzle? That’s quite interesting. Because a lot of people swear by certain filaments on heated glass plate. Any pictures of a used nozzle after it’s been through ABS, etc?
@ThantiK I added 2 pictures of the used nozzle. I will get another one of the nozzle directly after printing. You can see the plastic is stuck onto the brass but not the jewel.
Interesting design. I’m merely interested in 3d printing rather than a hobbyist or professional. My actual field of expertise is Metallurgical Engineering. Do you mind discussing the material your jewel is made from? My first guess is sapphire, but that is mostly a guess. Also have you looked at abrasive water jet nozzle construction, you may be able to adapt some of the components they use and possibly reduce your costs.
Hmmm… Interesting. What kind of a price would you get for 500 of them?
@Joe_Morrison the jewel material is man made sapphire similar to what is used in a water-jet. In a water-jet the jewel is more inset into the steel holder. This design is using the jewel for the wear surface and protrudes from tip a bit.
Gets a +1 for thinking outside the box in terms of material used in the design. Someone that needs the functionality I don’t see being resistant to the pricing. If one is printing CF impregnated materials it’s only going to take a few hardened or tradidional nozzles wearing to make up the cost. OTOH, those that are printing PLA or ABS (most everyone) propbably won’t have a need for it.
@William_Steele I can give you distributor pricing if you want to by more than 50. The cost drops a good amount with 1000 pcs. I have based my original number on 500 pcs/year.