Push-fit connectors keep failing I have recently commissioned a printer with a dual bowden extruder arrangement. I am using these fittings that I have purchased from McMaster. Twice now, I have left a print unattended only to come back to find that the tube has slipped out of the fitting at the extruder, and there is a pile of filament on the floor. Afterwards, the fitting no longer holds on to the tubing. I can insert it, but the fitting does not grip it. Does anybody have any advice for what to do here, or perhaps might there be some alternative fittings I can use here. Thanks https://reprap.org/forum/read.php?4,583667,583667#msg-583667 Tue, 17 Mar 2026 08:49:00 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?4,583667,584060#msg-584060 Re: Push-fit connectors keep failing https://reprap.org/forum/read.php?4,583667,584060#msg-584060 jbernardis Reprappers Fri, 13 Nov 2015 13:12:27 -0500 https://reprap.org/forum/read.php?4,583667,583845#msg-583845 Re: Push-fit connectors keep failing https://reprap.org/forum/read.php?4,583667,583845#msg-583845
Quote
jbernardis
I have recently commissioned a printer with a dual bowden extruder arrangement. I am using these fittings that I have purchased from McMaster.

Twice now, I have left a print unattended only to come back to find that the tube has slipped out of the fitting at the extruder, and there is a pile of filament on the floor. Afterwards, the fitting no longer holds on to the tubing. I can insert it, but the fitting does not grip it.

Does anybody have any advice for what to do here, or perhaps might there be some alternative fittings I can use here.

Thanks

The ones that E3D supply are very good and have the advantage that they have a 4mm hole all the way thru so that the tube will pass through and get right upto the hobbed bolt Bowden coupler

They are manufactured in the UK by a company called JG Speedfit another one that is also highly recommended is the Norgren range such as Norgren adaptor

Don't know if these are available in the states but I believe that filastruder are distributers for the E3D stuff over there. see US Supplied E3D Bowden adaptors

HTH Doug]]> dougal1957 Reprappers Fri, 13 Nov 2015 02:45:42 -0500 https://reprap.org/forum/read.php?4,583667,583817#msg-583817 Re: Push-fit connectors keep failing https://reprap.org/forum/read.php?4,583667,583817#msg-583817
Also note that I have seen some of these that have a deeper push on them than it looks like on the one you posted. By that I mean that the plastic rim is further away from the metal boxy and thus it must move further to unlock the tube. Just a thought.]]> tmorris9 Reprappers Thu, 12 Nov 2015 23:03:20 -0500 https://reprap.org/forum/read.php?4,583667,583811#msg-583811 Re: Push-fit connectors keep failing https://reprap.org/forum/read.php?4,583667,583811#msg-583811 jbernardis Reprappers Thu, 12 Nov 2015 22:44:33 -0500 https://reprap.org/forum/read.php?4,583667,583796#msg-583796 Re: Push-fit connectors keep failing https://reprap.org/forum/read.php?4,583667,583796#msg-583796 etfrench Reprappers Thu, 12 Nov 2015 20:46:57 -0500 https://reprap.org/forum/read.php?4,583667,583667#msg-583667 Push-fit connectors keep failing https://reprap.org/forum/read.php?4,583667,583667#msg-583667 these fittings that I have purchased from McMaster.

Twice now, I have left a print unattended only to come back to find that the tube has slipped out of the fitting at the extruder, and there is a pile of filament on the floor. Afterwards, the fitting no longer holds on to the tubing. I can insert it, but the fitting does not grip it.

Does anybody have any advice for what to do here, or perhaps might there be some alternative fittings I can use here.

Thanks]]> jbernardis Reprappers Thu, 12 Nov 2015 15:21:51 -0500