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PC4 M8x1.25 Bowden Pneumatic Connectors  

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bmorgenthaler
(@bmorgenthaler)
Eminent Member
Hand drill with inserted scrape ptfe

I was able to use a vise (could probably used a larger/heavier clamp too) to hold the connecter and then used a 5mm bit in my handheld drill to bore it out. I used a recommendation that I saw in another thread that used a disposable piece of inserted ptfe to keep the collect teeth out of the way of the bit. So far the pair that I've done have been performing flawlessly.

 

Mini+ with FW:4.3.3RC1, Bondtech Extruder, drilled out PC4-M8 couplers, 1 piece Capricorn bowden....
Posted : 18/09/2021 1:55 am
Mr.Shaky
(@mr-shaky)
Eminent Member
testing an alternative source

I did a couple ABS & ASA prints recently that did what you'd expect to the stock hotend...

 

While I'm waiting for my Copperhead order, I started looking for the PC4 fittings...then I found this thread.  I really didn't want to wait a month for an order from a seller on AliExpress, so I kept looking and found the part at Dyze Design (also frustrated that Amazon sabotages its search results.)  In this instance, I'm comfortable spending more for less if it supports a part of the maker community...

I am left with one question:  with a through-hole connection at both ends, how long of a tube am I going to need? 

 

Prusa MINI w/Bondtech IFS extruder, Slice Copperhead groovemount, bed-leveling mod...
Posted : 19/10/2021 2:29 am
fuchsr
(@fuchsr)
Noble Member

Kudos for finding it! It's pretty much impossible to unearth this rare unicorn anywhere.

But I must admit, $4 a pop, plus a whopping $20 shipping is a bit more than I'm willing to spend given that my non-pushthrough PC4 fittings work just fine... 

Posted : 19/10/2021 2:39 am
Mr.Shaky
(@mr-shaky)
Eminent Member
RE: [insert your value judgement here]

And that's fine--I'm not saying everyone should drop everything and get them to replace what they already have.  I really would like to have the single-piece tube from my Bondtech extruder to the Copperhead, but I don't have the tools or patience to drill out the other fittings as others have suggested.

Just for reference, Bondtech lists an all-metal PC4-G1/8" at US$5.25, so Dyze charging US$3.21 (CA$4) doesn't seem too bad for a custom, (probably) low-volume part.  My shipping was actually only US$15, and that tends to be the going rate for low-volume small boxes by FedEx. (While I was typing this, I got a pickup notification from FedEx...)

 

This post was modified 2 months ago by Mr.Shaky
Prusa MINI w/Bondtech IFS extruder, Slice Copperhead groovemount, bed-leveling mod...
Posted : 19/10/2021 4:38 pm
karl-herbert
(@karl-herbert)
Illustrious Member
RE: testing an alternative source

With Aliexpress you have to be careful. The description "push through" usually does not apply, which means that you wait a few weeks for delivery and then have to drill out. By the way, I did it with a drill, reamer and battery screwdriver, because I don't have a lathe.

wbr,

Karl

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 19/10/2021 5:16 pm
thrawn86
(@thrawn86)
Honorable Member
ali

got mine from ali, no pushthrough.

 

shoved some tube in there and drilled it very carefully with a 4.5mm bit, works fine so far

Posted : 25/10/2021 12:45 am
JMN
 JMN
(@jmn)
New Member
Dyze Design M8x1.25 PushFit

If anyone is interested - I went ahead and clicked on order for the Dyze Design M8x1.25 push fit / pass through connectors.

STAY AWAY.

- There is 1mm movement / play once the tube is inserted.

- The tolerances on all the connectors I purchased are so tight that removing the tube (really have to pull hard) strips the OD tube producing shavings that will fall into whatever you're threaded into.

Sent an email to the company but no response yet. Really disappointed 🙁

 

 

Posted : 02/11/2021 12:25 pm
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Dyze Design M8x1.25 PushFit

This is of course annoying. You can try to carefully rework the holes with a 4.1mm drill (I also had to do this with the Ali push fits). The push fit hole diameter of 3.95mm was simply too small for the 4/2mm PTFE.

wbr,

Karl

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 02/11/2021 1:16 pm
bmorgenthaler
(@bmorgenthaler)
Eminent Member
No 1mm play but I do have the shavings
Posted by: @jmn

- There is 1mm movement / play once the tube is inserted.

- The tolerances on all the connectors I purchased are so tight that removing the tube (really have to pull hard) strips the OD tube producing shavings that will fall into whatever you're threaded into.

I picked them up as well. I haven't noticed the play, mine are tight in the hotend and extruder. I did notice though that after pushing the PTFE through the bit at the top (I honestly have no idea what to call it) could be pulled up more, so I had some different sized bowden clamps that I found one to fit and it keeps it snugged up.

As for the shavings, yep got that, and it sucks. I'm testing out so new filament, trying to figure out the right temperature for it and I was getting random clogs. Multiple cold pulls and playing with some sticky cleaning filament and I removed a nice bit of PTFE shavings from inside the heatbreak.

I'll be interested to hear what they have to say.

 

Mini+ with FW:4.3.3RC1, Bondtech Extruder, drilled out PC4-M8 couplers, 1 piece Capricorn bowden....
Posted : 02/11/2021 1:59 pm
Mr.Shaky
(@mr-shaky)
Eminent Member
RE: clip not included 🙁

I haven't had a need to remove the tube on mine since I swapped in the copperhead hotend, but I did notice the play causing problems with retraction.  odd that the copperhead came with a clip and these fittings did not, so I found one that worked (Z scaled to 60%): https://www.thingiverse.com/thing:4721314

This post was modified 1 month ago by Mr.Shaky
Prusa MINI w/Bondtech IFS extruder, Slice Copperhead groovemount, bed-leveling mod...
Posted : 02/11/2021 2:09 pm
jmac
 jmac
(@jmac)
Active Member
RE: PC4 M8x1.25 Bowden Pneumatic Connectors

Hi all

Think I will also do this mod on my new mini.

Could we not just drill and tap the hole on the extruder and hot end to m10?

Seems like m6 and m10 connectors are widely available.

Cheers

Posted : 08/11/2021 2:02 pm
jmac
 jmac
(@jmac)
Active Member
RE: PC4 M8x1.25 Bowden Pneumatic Connectors

Scrap that, just looking at it and m10 would be too wide unfortunately.

Posted : 08/11/2021 8:54 pm
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