looking for a replacement embedded pneumatic fittings / coupling for my e3d v6 (1.75mm). anyone know what they’re called? i don’t mean the chinese knockoff ones (pc4-01 i think), the original embedded ones.
i’ve browsed all sorts of categories on aliexpress and the likes - but could not find anything remotely similar.
sorry, late here and tired… i’ll edit my original post but i’m asking about those embedded pneumatic fittings.
these - http://e3d-online.com/image/cache/data/mechanical/CouplingsMetal-1000x1000.JPG
buying them from the states (or from e3d themselves) just does not make sense. i live in israel, and have not found a u.s store that has free shipping (or a very cheap one). so it’s going to have to be from china, which is why i am looking for a model/part number/type. unless this is not a standard “off-the-shelf” part?
Not a standard part, IIRC they’re made in the UK by one specific company. Shipping from Filastruder should be $6 internationally for small packets.
The parts in the image from Tom’s second post appear to be the same type used in the BCN3D Sigma.
Would shipping from Spain be less difficult than shipping from USA? I believe that BCN3D is located in that country.
Well, shucks, I just realized that the above listed collet is for 3mm filament. Won’t be much use for 1.75mm, will it?
Look for Camzolli fittings. If you can find the right size, they are by far the best for PTFE tube I have found so far.
@Tim_Elmore thanks, i was afraid it might be a custom fitting. really sucks if it is, though i think the tightening/push in thing (4mm or 6mm one) might be a standard and the brass ring is a custom one.
if i run out of options i’ll consider it. but it’s quite a bit more than what i was expecting to pay for it (it comes out to almost $10).
@Fred_U from my experience shipping inside the EU is usually not that costly, but shipping outside usually involves either dhl or fedex which would cost an extra arm and leg 
but looking at that part i did get an idea since that tightener does seem to be a more common part (i’ve found some i might be able to use on aliexpress), i could print the embedded part that you screw in (the original is brass i think) out of petg and use that springy push-in thing. so thanks…
@Ben_Hudson you mean camozzi fittings? i’ve come across them in my searches (the have a few knock-offs on aliexpress) but from what i can see they’re just quality versions of regular fittings… i couldn’t find anything resembling the e3d v6 fitting. have you seen one that you think is a match? did i miss it?
Yes, sorry, the Camozzi. I haven’t seen exactly what you are looking for, but it looked like a standard fitting taken apart or broken to me, so I thought I would make a suggestion.
i understand, thanks. i thought i might have missed one of their products.
turns out i can get a 10 pack of those push-in coupling collets for about 9-10$ from aliexpress. trying to see if one of the sellers would be willing to sell 4-5 of them.
in the meanwhile i have gone ahead and printed this http://www.thingiverse.com/thing:1509526 which works perfectly. i might even end up not replacing it at all. i’ve thought about drilling it to 6mm and printing a 2-2.5mm tpu sleeve for friction and better hold. what do you guys think?
@Tom_Keidar
If you have any doubt about the solidity or security of the 3d printed items you are considering, it can be useful to draw a line on the bowden tube at the point of entry to the fitting. As the printer performs, it makes it easy to assess any tube creep. My Sigma was pushing the bowden tube up instead of pushing the filament down. With the aforementioned fittings, I was unable to get a secure fit. The solution was simple, a wedge-shaped shim under the lip and no more creep.
One person created a threaded fitting that screwed into the top of the hot-end housing but it reduced the wall thickness of the bowden tube and also required that one re-calibrate the nozzles if one removed the bowden tube. With the shim. it’s not required to re-calibrate. Curiously, since I’ve put the shims in place, I’ve not had to remove the tube.
@Fred_U marking where my bowden tube meets the printed collet is the first thing i did (just so i know if it moves). i fully expect it NOT to last more than a few months, as there’s nothing tightening it but the the friction and ptfe is a pretty slippery substance (hence it’s job). my more permanent solution would be to either “wrap” the tube with a printed tpe sleeve (and maybe have some horseshoe lock on that) or use replace horseshoe collets from aliexpress and of course print some horseshoe lockers for them.
i constantly change filaments on my bowden extruder machine, so this solution needs to be able to work repeatedly for a long period of time (unlike the originals which wore down eventually).