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PaoloRob

Mk8 extruder mod

by PaoloRob Mar 4, 2017
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Hey there, thanks for this worked perfectly. I was wondering what PTFE tube diameter should i get for printing 1.75mm filament? I have been using this adaptor without the PTFE tube haha.

MK8 as supplied has the hotend heatsink where you part goes, so it won't work.
Easier and better to just extend the PTFE tube or depending on the hot end, the 6mm steel tube and bevel it.Did it on my MK8 then in my own designed extruder/hotend. Anyway, I already wrote that many time for the same designs.

It works pretty fine on my printers and those of my friends wich i did give this design months ago, decided to publish it only now cause i got asked a lot how i manage to print flexibles so flawlessly. By the way the majority of these Aluminium kits come without the cooling fin's wich is not needed anyway, just check the pictures and you will see how it goes mounted together, nothing simpler as that, no need to extend and bevel throat.

I am speaking about the best and simplest way to do it. Took me 5 min to do on my MK8.
Your choice to make it more complicated and limited than it should be.
Note there is plenty of similar 3D printed guides published here, at least yours use a PTFE tube which is fine.

The best and simplest way for a 3D printer owner is without any doubt to simply print it ! Your suggestion is totally unpractical and for most users it will imply to buy a longer throat , to have and use tools to shape that metal part and not every 3D printer user has this at hands. you say it took you 5 min to do it , i say it's even doable in less as long you have the parts handy wich again regular 3D Printer Users have not. So there is nothing easier and simpler than press that print button and let the magic happen, once it's done just take a little piece of ptfe tubing, wich most printer come with some spares and sape it to match with a sharp knife, wich again is available in every household.
I did guess my self that there would surely have been some similar designs and i did not even bother to search for it, had this solution used since quite a few months now and shared the file among friends until i got asked to simply publish it, so that's how it got here.

On the MK8, just a few turns of the 6mm threaded heat break.
Anyway, your "design" will not work for most as there is the heatsink.
And yes plenty of identical "design" just without the flange that interfere with the heatsink.
Anyway, this is kid's stuff and I won't waste more time on it. My MK8 is in a box as spare.

I agree , you did behave like a kid from the very beginning , i only did reply to see how far you would push it. Was quite entertaining and fun cause it seems to bother you enormously. :)
Like i said it does work flawlessly and if you did read previous reply's you should have read that it works without the heatsink.
On the other hand screwing up the throat will rise the nozzle so far that the carriage will hit the bed in most cases so your idea is a total fail and you're saying it your self since it landed in your spares box. I am using it on 2 printers besides all the e3d's i have on the rest of my printers but they work too nice with this mod for not to use em.

PS: if it was a waste of time why didn't you just ignore it from the very beginning ? no need to answer tho, :)