Ewigkeit PC4-M6 Pneumatic Fitting Push to Connect + PC4-M10 Straight Quick in Fitting for 3D Printer Bowden Extruder (Pack of 20pcs)

Great improvement over stock Ender 5 fitting. Only problem was the filament jamming against the flat bottom of the extruder (brass) fitting. Usual simple diagonal cut didn’t work, had to be like a pencil point to pass through the fitting. I took a drill bit to make a very small bevel at the bottom inside of the fitting and now the filament slips in quite easily with just a single snip at the end. The brass is soft enough to just gently hand turn the bit to make the bevel. Just a couple of twists is all it takes, then rinse with alcohol to wash out any debris. Just be sure to use a sharp bit that’s smaller then the threaded part. Just need to slightly bevel the sharp edge, less then 1 mm. Just remember to just use your hand to twist the bit and not a drill! This worked for me and I will not be responsible for anyone’s bad results trying this method.

These couplers are really great. They have thread locker on them already AND a rubber sealing washer in the outside threads. On the inside of the coupler there are actual metal teeth that grab the Bowden Tube. This is exactly what you want. There is no slipping of the tube with these.

The Fittings are off-center and when I tightened the fitting into the extruder unit, my Ender 5 could not load any filament. This even occurred when I manually loaded the filament through the extruder into the Bowden Tube and into the Nozzle Assembly. It would not feed any filament even in those conditions. It would separate my Bowden tube from the fitting and extruder. I even tried Super Gluing the outsides of the tube down into the fitting. Completely useless. If you look at the borders of my fittings, notice how one side has a lot more space than the other side to its threaded sides. This points to flawed manufacture process for my fittings. I am returning the items and likely won't by from Ewigkeit ever again because previous reviews have pointed this out to Ewigkeit and they still sent a new customer the flawed fittings. Looks to be a money grab by the company. (By the way I wish I would have read the reviews warning me because I skimmed by them when I first viewed the product.) Live and Learn.

I was pleasantly surprised by this purchase, they hold your tube really well, I did not even need to use a clip for retraction, I did how ever have one issue, the tab on some of them for retracting the tube from the fitting, not so good. I had to remove the whole fitting spinning the tube inside the whole way, and then pull the tube from the other side. In my opinion this is less of a problem then it being lose. Good luck and happy printing

These are much better than the factory Ender 3 fittings. I did notice an issue on quite a few of the brass fittings, where the entry hole is off center. This causes me to have to disconnect the PTFE tubing, unscrew the fitting from the extruder, and manually feed the filament into and through the fitting, reinstall the fitting, and re-connect the PTFE (Capricorn) tubing. I recommend pulling the PTFE tube from the fitting before unthreading the fitting, as the teeth inside the fittings will cut into the tube and could cause problems over time. Overall, a good upgrade and pretty nice compared to the factory Creality fittings.

good grip on the bowden, collar is well made - but - tolerance is just a *little* tighter inner diameter and snags the filament when changing rolls, PLA. seems the expanded PLA from the hot end is just large enough to snag at the throat of the connector so I have to unscrew the connector and clip off the pla then reconnect.. not exactly fun..

Replaced my fittings on my Ender-3 and it works better than new, along with some Capricorn PTFE tubing. Smooth sliding and fit well! I've been printing non-stop for about 6 months now, and had a jam, so I figured to replace these (after some video suggestions) while cleaning out the hot-end. Great fix for a low price (especially per connector)!

I have an Ender 3. I replaced the stock fittings since they are not easy to use when adjusting the tubing. I also updated to Capricorn tube and these work great with it. They fit perfectly and compress easily to slide the tube through it.