Bambu 4-in-1 PTFE Adapter Mount

Bambu 4-in-1 PTFE Adapter Mount

One of the best accessories for the Bambu X1C and P1 series printers is the Bambu 4-in-1 PTFE Adapter!
 

This is the 4-in-1 PTFE Adapter from the US store:
https://us.store.bambulab.com/products/bambu-4-in-1-ptfe-adapter
 

4-in-1 PTFE Adapter from the Global store:
https://store.bambulab.com/products/bambu-4-in-1-ptfe-adapter

I find it very useful! If you have an AMS, and sometimes use an external filament spool, this adapter from Bambu prevents you from forgetting to reconnect the AMS to your printer and having filament spill all over the floor and rear of your printer the next time you use your AMS! 
 

Yes, I've done this several times! Always leaving your AMS connected to your printer using this adapter solves this problem, while still allowing an external spool of filament to be easily used when needed. I really think Bambu should have included this part with each AMS! It's this useful!
 

However, there is a flaw in this part directly from Bambu! Mounting it directly on the rear of the X1C (and possibly the P1S) printer as designed by Bambu introduces more curves into the PTFE path. Every extra curve in the PTFE tube adds friction and a possibility of a filament feed or retraction error when using the AMS. By letting it dangle in free-air sort of solves the friction issue, but not entirely, and it also can affect repeatability as friction can change from time to time as the part moves around.
 

This is the 4-in-1 PTFE Adapter installed on the rear panel of the Bambu X1C

This mount solves two issues while being a simple design:

1. This mount will stop the 4-in-1 PTFE Adapter from loosely flopping around.
2. This mount will hold the 4-in-1 PTFE Adapter at an angle to minimize internal friction of your filament caused by flexing the PTFE tube while entering the printer.

Printing Instructions:
 

You can print this out of any material. I used PLA. This part never sees any high temperatures, nor stress, so no need to worry about heat affecting this, nor with the strength of the part. My print profiles is set to gyroid 10%, so there don't worry about printing this. No supports are needed.
 

4-in-1 PTFE Adapter mount as printed on the gold Textured PEI build plate

Print as shown on the build plate. I included print profiles for two popular build plates, both the Textured PEI plate as well as the Cool Plate in case you have one or the other.

Hardware needed:
 

In addition to printing this mount, you will need TWO M3 x 8 machine screws. Or alternatively, ONE M3 x 8 machine screw and ONE M3 x 10 machine screw.

You may possibly use one of the left-over screws from your original Bambu shipping parts if you still have them. Pick one of these left-over screws ONLY to be used to mount the Bambu 4-in-1 PTFE adapter to this mount. Don't try to use one of these screws to connect this mount to your printer as this requires an M3 machine screw!
 

Assembly and installation:
 

Step one:

The first step is pre-thread one of your M3 x 8 (or the M3 x 10) machine screws into the mounting block as shown. Be sure to try to thread it in perpendicular to the sloped surface as shown. This is to pre-form the threads to allow for easy installation in a later step. The hole is only 10mm deep, so don't try a longer screw. There are threads in this hole already to help you, but simply pre-threading in the machine screw at this step is easy to do. There may be some friction and it may seem that the machine screw does not thread in easily. This is by design and does not affect the use of the mount but is to keep the screw secure and not too loose.

Pre-install important step: Pre-thread a M3x8 (or M3x10) machine screw perpendicular to the sloped surface. Thread it all the way in to pre-form the threads, but up to a maximum of 10mm deep.

The hole is purposely an angle to the sides of mount itself, but the screw must be perpendicular to the sloped surface. The hole is pre-threaded, but you may need to use a bit of pressure to pre-start the M3 screw due to variances of filament and printer calibration settings. This is designed so that the screw will hold tight. Once the head of the screw touches the surface of the mount, stop! Don't over tighten the screw and strip the threads of the hole.

Step two:

Remove one screw from the top right-hand corner of the rear panel from your printer. Save this for future use if you ever need to remove this mount.

Step three:

Using one M3x8 machine screw, mount this 4-in-1 PTFE Adapter Mount to your printer (note that a M3x10 screw will be too long for use in this step). There is a small lip on top of the mount which should slightly catch the top of the rear panel of your printer. It should not interfere with any riser that you may be using. Its only purpose is only to keep the mount square and to not rotate. If you are using a riser that interferes with this lip, you can simply slice if off with a knife blade (or your metal bed scraper blade).

4-in-1 PTFE Adapter Mount installed on the printer with one M3x8 machine screw. NOTE: Don't use a left-over shipping screw here, this must be a M3x8 machine screw!

Step four:

The final step is to connect the 4-in-1 PTFE Adapter to this mounting block using one M3x8 (or M3x10) machine screw into the hole which you pre-threaded in step one. Alternatively, this is where you can use one of the left-over shipping screws as it's not important to use a machine screw in this hole.

Use one M3x8 (or M3x10) machine screw to install the 4-in-1 PTFE Adapter to the mount into the pre-threaded hole on the mount. The M3x8 screw is a bit short, so don't over tighten it and strip the threads. Or you can use an M3x10 machine screw here, or alternatively one of your screws left over from the shipping container of your printer. Don't over tighten the screw. This is not a high stress area.

Note that this does not interfere with use of the external filament spool holder as shown below. 
 

The 4-in-1 PTFE Adapter Mount works perfectly with an External Filament Spool as well as with the AMS

I hope you find this mount useful! Please post some photos of your installation and I welcome comments or suggestions!

I only own an X1C printer, however I have heard from a few P1S owners that this mount also works perfectly for them as it is with no changes needed!

I'll be happy to try to answer any and all questions!

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