P2S AMS Buffer PTFE Tube Guide ⧸ Super Straight

One thing that bothered me was how the PTFE tube from the AMS Buffer to the printhead rubs against the metal edge of the buffer housing. That’s something I definitely don’t want.

Designed as part of my ongoing collection of practical Bambu Lab upgrades. Each model is conceived, printed, and endurance-tested on my own machines, refined through dozens of iterations to match the printer’s true mechanical behavior. Precision isn't assumed here, it’s verified layer by layer.   Bambu Lab P2S: P2Series Design Journey   Follow me if you like my work, that kind of appreciation really dries my filament. Likes and boosts feed the Maker World algorithm and keep the new models coming

So I designed this model to keep the tube perfectly aligned and free from contact with the metal parts. PTFE sliding inside PETG or PLA will last practically forever. The friction is extremely low, and there’s virtually no wear, perfect for continuous motion paths like this.

Mounting is simple, you’ll need two M3×8 screws. You can either order them using the link below or reuse the ones from the filament holder if you don’t use it.
Or slide it onto a mounting rail or use the unused Spool Holder Base (more Spool Holder Bases, see my model #18), done.

And yes, the unused threads of the P2S are indeed very poorly cut M3 threads. I measured the original screws and compared them with my M3 screws according to DIN 13-1. They are absolutely identical. Even the original screws from the existing spool holder base do not fit properly into the holes intended for these screws. Even if it hurts, take an M3 screw and force it into the hole. Then unscrew it again, throw it away and take a new screw. Once the threads have been "deflowered", they can be used with the original screws and M3 screws as smooth as butter. 

And remember: PTFE tubes are wear parts. Good guidance means they last longer, but they won’t last forever.

Part #15 in my P2Series Design Journey.

Accompanying Model Tip: Screws come loose and tighten effortlessly when you use the right tool. Half of the magic is the perfect handle. Naturally, Wera style.   Meet “Wera Style MakerWorld Screwdriver Kit Handles” https://makerworld.com/models/2199275 These handles accept all bits from the MakerWorld Screwdriver Kit, especially H2.0 and H1.5, the sizes used for Bambu Lab screws.   Treat yourself, your eyes, and your makerspace to something genuinely nice. Get the MakerWorld Screwdriver Kit and pair it with the matching Wera style handles.

Translation Notice: I am not a native English speaker. I write all descriptions in English to ensure the best automated translation into other languages. To make the text smoother and more readable, I use language tools to refine my wording.

Bill of Materials Notice: Hero Shot models are usually printed in Bambu Lab PLA Basic, primarily Pumpkin Orange, Purple and Matte Charcoal Black. The Bill of Materials contains the recommended filament for the model, which may differ from the filament used for the photos.

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