Bowden PTFE tube Clamp
thingiverse
This is version two of a Bowden tube clamp using a nut to compress the fittings instead of a zip tie. I used part of a design by krtektm, who also created a compression type fitting that inspired my idea. It should fit standard 4mm PTFE tubes and clamp over the collar of the fitting. You'll have to clear out the slot that fits the collar as there will be some filament in the groove that shouldn't be left behind. I based my design on this fitting: https://www.thingiverse.com/thing:602481. I also recommend checking out this neater design, which I just found: https://www.thingiverse.com/thing:2767843.
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