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Does my Teflon spacer need to be replaced?

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Hi all,

Been printing a bunch of things over the past few weeks and everything has been good apart from a clog here or there. Today I hit massive under extrustion and knew something was up (Red XT at 245C, .1mm at 60mm/s). Had a bunch of skipping and the filament got torn up (Still running the stock extruder FYI).

I did two atmoic pulls, first one is the closest, second is the furthest. I always do my pulls with PLA because it seems to work better:


Based on those mushroom looking shapes do we think my spacer needs to be replaced? I pretty much only print at 240-245C.

Im doing a test print right now and so far so good after the pulls, I dont really feel any friction in the hot end when pressing in filament or removing it, but I know thats not any good measurement.

Any advice would be very helpful!




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The teflon coupler deforms at the end where it meets the hotend. you can check it by removing it and seeing if the end is squished in or has a lip in the inside. This happened to mine over a month ago and i just re-drilled the hole with the correct size drill bit and it has been working fine ever since.


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I have been printing with Bronzefill recently which, I think, has resulted in more blockages. Increased flow helps reduce the blockages though. Anyway, i took the teflon coupler out yesterday and you can notice quite easily if there is any deformation. Same as Labern above, passed a drill bit through it and working ok now...cross fingers :)


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