Stronger alternative to PTFE and PTC fitting?

[jesse]

I keep ripping the PTFE tube inside the PTC fitting. I'm using the Steve's Extruder.

Does anyone know of a stronger alternative?

When the PTFE rips, the PTC fitting is ruined.

[mhackney]

The folks at E3D-Systems provide a neat fitting with their E3D hot end that is all plastic. I don't know who makes it but they modify them (org the manufacturer does to their specs) to drill out the back so the PTFE passes all the way through. Might be worth emailing them and asking what they use. I vaguely recall that there is a connection with them and a UK company that does fittings.

[mhackney]

Here's the link: http://e3d-online.com/HotEnd-Spare-Parts?product_id=124

But note, these do not fit the threads in the EZStruder or SeeMeCNC hot end. But perhaps the proper size exists.

[Eaglezsoar]

I keep ripping the PTFE tube inside the PTC fitting. I'm using the Steve's Extruder.

Does anyone know of a stronger alternative?

When the PTFE rips, the PTC fitting is ruined.

Do you have any idea what is causing the tubing to rip out of the fitting?

[cope413]

they won't tell you where they get them, but I found what they use...

It is a UK company - John Guest

You can buy a 10 pack on grainger

http://www.grainger.com/product/JOHN-GU ... ctor-1WTX2

They drill it out so that the bore is the same size from top to bottom.


If you use little c clips on them after the bowden tube is seated, then retractions aren't able to articulate the PTC open/close, and it'll last forever

[Eaglezsoar]

they won't tell you where they get them, but I found what they use...

It is a UK company - John Guest

You can buy a 10 pack on grainger

http://www.grainger.com/product/JOHN-GU ... ctor-1WTX2

They drill it out so that the bore is the same size from top to bottom.


If you use little c clips on them after the bowden tube is seated, then retractions aren't able to articulate the PTC open/close, and it'll last forever

Great find! Now if we can come up with an adapter so they fit the 5mm threads of the Ezstruder and the SeemeCNC hotend.

[bubbasnow]

they won't tell you where they get them, but I found what they use...

It is a UK company - John Guest

You can buy a 10 pack on grainger

http://www.grainger.com/product/JOHN-GU ... ctor-1WTX2

They drill it out so that the bore is the same size from top to bottom.


If you use little c clips on them after the bowden tube is seated, then retractions aren't able to articulate the PTC open/close, and it'll last forever

Great find! Now if we can come up with an adapter so they fit the 5mm threads of the Ezstruder and the SeemeCNC hotend.

[img]http://cdn.shopify.com/s/files/1/0276/2 ... 1383663797[/img]

i think if you just purchased the direct drive hot end (or just the top portion) you could drill and tap for w/e PTC fitting you want.

[mhackney]

they won't tell you where they get them, but I found what they use...

It is a UK company - John Guest

You can buy a 10 pack on grainger

http://www.grainger.com/product/JOHN-GU ... ctor-1WTX2

They drill it out so that the bore is the same size from top to bottom.

If you use little c clips on them after the bowden tube is seated, then retractions aren't able to articulate the PTC open/close, and it'll last forever

Just wanted to let folks know - these ARE NOT the correct thread for the E3D. This part is 1/8" BSPT - the "T" is for tapered. I contacted Josh via their new forum and they acknowledged that the part for the 1.75mm filament PTCs is actually 1/8" BSPP and are not tapered. If you need a replacement, or like me, want a tap to make some adapters for the EZStruder business end, you need a 1/8" BSPP tap.

The tapered threads on the BSPT part are much longer and will not seat properly in the top of the E3D.

[bdjohns1]

BTW, here's a link to the correct part on Grainger - the 1/8 BSPP version. Still needs to be bored out.

http://www.grainger.com/product/JOHN-GU ... =P2IDP2PCP

[McSlappy]

I figured out a good tip to reduce wear and tear on the e3d end of the bowden tube and also to eliminate the PTC movement altogether.

Just screw the PTC 90% in and then push the bowden tube down as far as it'll go. Tighten the PTC fitting the rest of the way and voila, a nice snug fit on the tube and no movement whatsoever on the PTC.

[Eaglezsoar]

I figured out a good tip to reduce wear and tear on the e3d end of the bowden tube and also to eliminate the PTC movement altogether.

Just screw the PTC 90% in and then push the bowden tube down as far as it'll go. Tighten the PTC fitting the rest of the way and voila, a nice snug fit on the tube and no movement whatsoever on the PTC.

Excellent tip for the PTC connector. You down under dudes are full of good ideas!

[McSlappy]

We learn to come up with good solutions since we've all had to figure out lots of problems during our lives... How to eat upside down. How to kill lots of spiders. How to walk on the backs of sheep. How to throw a boomerang. How to make bush tucker. How to Australian kiss... so on..

That PTC trick let me drop my retractions way down, so I was happy

[Eaglezsoar]

We learn to come up with good solutions since we've all had to figure out lots of problems during our lives... How to eat upside down. How to kill lots of spiders. How to walk on the backs of sheep. How to throw a boomerang. How to make bush tucker. How to Australian kiss... so on..

That PTC trick let me drop my retractions way down, so I was happy

How to make bush tucker?

[barry99705]

We learn to come up with good solutions since we've all had to figure out lots of problems during our lives... How to eat upside down. How to kill lots of spiders. How to walk on the backs of sheep. How to throw a boomerang. How to make bush tucker. How to Australian kiss... so on..

That PTC trick let me drop my retractions way down, so I was happy

How to make bush tucker?

http://en.wikipedia.org/wiki/Bushfood