Bambu Lab 4in1 Refill Modular Spool v2 AMS - Free 3D Print Model

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NT4C.pl

3D Printer>3D Printer Accessories

IP Report

Print Profile(6)

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H2D

P1P

A1 mini

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X1E

H2S

X1 Carbon

H2D Pro

H2C

X2D

A2L

[NEW] Spool Core v2

Designer

2.3 h

2 plates

4.2(13)

[NEW] Rings v2

Designer

1.4 h

2 plates

4.6(7)

Spool core v1 + Rings v1 [old version -> not recommended]

Designer

2.6 h

3 plates

4.0(4)

Spool core v1 + Rings v1 [old version -> not recommended]

Designer

3 h

4 plates

3.8(6)

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103

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PLA Basic

Description

Introducing the updated 4in1 Filament Modular Spool v2 or Bambu Lab 4-in-1 filament inserts 🧵🧩, designed as a lightweight, functional and fully compatible alternative to standard spools — now safer and more reliable in everyday use ⚙️✨.

The model allows you to store filament inserts inside original Bambu Lab boxes 📦 and instantly convert them into a ready-to-use spool by attaching dedicated conversion rings 🔄.

The core structure remains 100% compatible with Bambu Lab inserts and now uses a screw-locking snap mount that prevents the adapter from sliding out 🧠🔒.

The surface still includes a built-in filament weight indicator ⚖️ helping estimate remaining material (1000 g / 800 g / 600 g / 400 g / 200 g) 👀📊.

The integrated filament end-clip 🧷 has been repositioned so the filament can be secured even when the rings are installed 🚚🧵.

Using the modular AMS conversion rings, the insert can be transformed in seconds ⏱️ into a full-size spool with dimensions identical to the original, fully compatible with AMS, AMS 2 PRO, AMS HT, and AMS Lite 🤖✅. The conversion rings now attach using threaded click-lock connections 🔩, ensuring they stay firmly connected to the core during printing.

The geometry has been optimized for stiffness and low material usage ♻️📐. The core prints on all Bambu Lab printers (including A1 mini), while the rings require A1 / P1 / P2 / X1 series printers 🖨️.

Thanks to the modular design, empty inserts are easier to store, space consumption is reduced and filament organisation remains clean and efficient 🗂️✨.

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If you like this model, please leave a boost and follow my profile - more functional 3D designs are coming soon 🚀

Features

✅ 100% compatible with Bambu Lab 4-in-1 filament inserts
🔒 screw-locking snap core mount preventing accidental release
🔩 threaded click-lock conversion rings
🔄 conversion rings transforming the insert into a full spool
📐 dimensions identical to the original Bambu Lab spool (after rings installation)
🤖 compatible with AMS / AMS 2 PRO / AMS HT / AMS Lite
🧷 filament end-clip preventing accidental unwinding (even with rings installed)
⚖️ integrated weight scale: 1000 g / 800 g / 600 g / 400 g / 200 g
♻️ low filament usage during printing
📦 modular structure for easy storage inside original Bambu Lab packaging
⚡ quick assembly and removal
🖨️ core printable on all Bambu Lab printers (including A1 mini), rings printable on A1 / P1 / P2 / X1 series printers

What’s new in V2

🔧 redesigned core mounting - secure screw-locking snap replaces the previous press-fit
🔩 conversion rings upgraded to threaded click-lock connection for reliable printing stability
🤖 added full compatibility with AMS Lite
🧷 repositioned filament end-clip - filament can be secured even with rings installed
📐 increased rigidity with low material usage and short print time
🖨️ split printability - universal core printable on all Bambu Lab printers, larger rings for A1 / P1 / P2 / X1 series

Documentation (1)

Assembly Guide (1)

4in1 Filament Modular Spool v2.png

Comment & Rating (103)

@YucaEnUtah

Print Profile

[NEW] Spool Core v2

Printed very nicely in PETG. I haven’t used it yet. Thank you

(Edited)

The profile uploader has replied

@NT4C.pl

Thank you very much for the 5⭐ and for sharing the photos 👍 It looks great in PETG - really clean print! 💚 PETG is a solid choice in terms of strength and slight flexibility, so it should perform well over time. Please let me know how it works once you actually use it in the AMS 🙂 I’m very curious to hear your real-world experience.

@YucaEnUtah

Replying to @NT4C.pl :

So I used it and the rings slide off the locks when spinning back and forth in AMS. The filament just goes everywhere. I had to trash half of my spool. I don't think I can use this again

(Edited)

@NT4C.pl

Replying to @YucaEnUtah :

I’m very sorry that this happened 😞 To be honest, this situation shouldn’t normally occur - I’ve tested this version multiple times in different AMS units and haven’t encountered this problem before. Just to make sure I understand correctly: was the issue that the rings slid off the core, or that the core inside the cardboard refill “unscrewed” and the spool came apart? I’d really like to understand exactly what happened so I can check whether something should be improved in the design. I’m also wondering if the issue could be related to using two different materials? Although I assume the only difference might have been the color of the filament, sometimes even that can slightly affect the properties of the printed parts.

@bouli89

perfect print I relaunched a second one with the spool to see if everything goes well and it's really great we remove it and directly in its box really great to see over time beautiful creation that costs little filament

The designer has replied

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@NT4C.pl

Thank you so much! 😊 I’m really glad the print went well and that you like the model. Great to hear that it works nicely with the spool and that it doesn’t use much filament. I hope it continues to work well over time. Thanks again for the feedback! 🙌

@user_2776671231

Print Profile

Spool core v1 + Rings v1 [old version -> not recommended]

too bad the inner diameter is too big for the AMS

The profile uploader has replied

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@NT4C.pl

Sorry to hear you had an issue with the fit 😔 The model is compatible with AMS, AMS 2 Pro and AMS HT, but it is not compatible with AMS Lite. I tested it on all supported systems and the fit was correct, so if you're using one of them please check that the scale in the slicer is set to 100% (no automatic scaling). I’m already working on a new version that will also support AMS Lite 🙂

(Edited)

@riosteeple2002

Replying to @NT4C.pl :

can't wait! love the idea of this design.

(Edited)

@NT4C.pl

Hi! 👋 Good news -> V2 of the model is now available 🔧✨ It now includes AMS Lite compatibility and an updated core/ring mounting system, so the fit issue should be resolved 👍 Please try the new version and let me know if it works correctly for you! Thanks for reporting the problem - it really helped improve the design 🙌

@bouli89

Print Profile

[NEW] Spool Core v2

I forgot the stars, I'm using it for the AMS lite, so the rings aren't useful to me, except to reinforce it, otherwise I don't see the point, it works perfectly for me, I'm printing a second one with a leftover spool, might as well make it useful 😁

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@DroneM

Boosted

The solution is good, but in my opinion, the plates with the crossheads should be permanently joined together. I glued them together with super glue, and so far they are holding up because they didn't want to hold very well. Another issue, the ring that goes into the cardboard sleeve should be twice as thick because it is too thin and easily deforms. This would cause it to hold better in the cardboard sleeve. I gave a boost, I hope my comment contributes to the creation of version V2 :)

The designer has replied

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@NT4C.pl

Thank you very much for your detailed feedback and support - I really appreciate it 😊 The elements were intentionally designed as modular to allow optional attachment of the ring. That said, you are right that not everyone needs this flexibility, so I plan to prepare an alternative fixed version in the near future. Regarding the ring that goes into the cardboard spool - it was deliberately designed to be thin to provide flexibility. During testing, I noticed small differences in the inner diameter of Bambu Lab cardboard spool, and this helped ensure compatibility. Your point about stiffness is very valid. I will look into improving this element while keeping its original function, and this will be addressed in a V2 version 😊 Thanks again for taking the time to share your experience - feedback like this really helps improve the design! 🚀

@DroneM

Boosted

Replying to @NT4C.pl :

Great, I'm waiting for the new model because it's really great, especially for emergency situations. Those cardboard sleeves usually get thrown away because they're not needed. Now they'll come in handy.

@NT4C.pl

Hi! 👋 I just released V2 of the model 🔧✨ It includes improvements based on your feedback - especially the mounting stability and ring connection. The core now locks securely, the rings use a click-lock thread and the overall rigidity has been improved while keeping compatibility 👍 Feel free to test the new version and let me know how it works for you - I’d really appreciate your opinion! 🚀 Thanks again for your support and helpful suggestions 🙌

@3D_WRLD

Boosted

Finally, a seemingly good spool that also prints for a relatively short time! 😁

The designer has replied

@NT4C.pl

Thanks! 😄 That was exactly my goal when designing this construction. Glad to hear you appreciate it 🙂 Happy printing! 🖨️✨

@user_1575299287

Same exact problem, the two faces don't hold the "weight" of the spool already during preparation and during printing it's a disaster! In my opinion, braces should be added to hold the two faces together

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@NT4C.pl

Just a quick update - V2 of the spool has now been released 🔧✨ It improves rigidity and the connection between parts, while keeping the fast print time 😄

@Karolien

I think the design is fine, but unfortunately my first time using it didn’t go very well. I put a new spool on, did everything as instructed, and when I tried to pick it up, the whole thing came apart. The result was a completely unraveled spool that I now have to rewind.Did I miss something? The parts feel very loose inside each other — maybe there’s a way to make the two inner rings click or lock together? Right now, they just slide out of the cardboard spool very easily.Aside from that, it’s definitely a good design, especially with the indication of how much filament is left on the spool.

The designer has replied

@NT4C.pl

Thank you very much for the valuable feedback - I really appreciate it. I’m very sorry that you had this issue during your first use and that it resulted in a fully unraveled spool. Cardboard core diameters are unfortunately quite inconsistent, and in some cases the part may fit too loosely. I’m aware of this issue and I’m already working on a second version of the design to eliminate this problem (it should be published here within the next few days 🙂). Until then, one simple workaround could be wrapping the printed part with a thin layer of tape to make the fit tighter. Thanks again for the feedback and for sharing your real-world experience using the model.

@NT4C.pl

This issue was related to the mounting method used in the first version. I’ve now released V2, where the core locking system and ring connection were redesigned - the parts lock together and shouldn’t slide out anymore 🔧✨ Please try the new version - it should prevent the spool from coming apart 👍 I’d be happy to hear if it works better for you!

@Karolien

Replying to @NT4C.pl :

Hi, Big improvement, still one more finetuning detail... A full spool which is rewinded by the AMS, still "Opens" on the sides, which causes filament to get stuck between the sides... No idea how this could be solved, but already a great job by attaching the inner rings!! Well done! (don't know if you now what I mean exactly... hard to explain ;-))

@user_2971412291

Boosted

I really liked this model. I tested it using both PLA and PETG. I own a AMS Pro 2, and due to the back-and-forth rotational movements, the interlocking parts do indeed come loose. This is the sole—yet significant—issue. The model would need to be redesigned so that the pieces fit together more securely—specifically both the main body and the wheels. If there were a designated spot to insert a pin or a single locking mechanism, it would solve the problem and make the solution perfect. In my case, I had to glue the parts together to prevent them from separating—which isn't ideal for a modular design like this one, as it means I'll lose the model when it comes time to replace the filament spool. Everything else is excellent—the size, the material usage, everything. Any possibility to do some to solve this problem? Thank you.

(Edited)

The designer has replied

@NT4C.pl

Thank you very much for the detailed feedback! 😊 I really appreciate it. I’ll take your comments into account, and if I continue developing this model further, I’ll definitely consider these improvements in the next version.

@przemokos

Boosted

Thanks for the model :) it prints nicely with PETG!

The designer has replied

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@NT4C.pl

Thank you very much! 😊 Great that the model prints well with PETG - it's a very good choice if spool durability is important 💪🧵 Thank you very much for the feedback! If you want to see more projects, feel free to follow my profile - I'm already working on the next models 😉✨

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@przemokos

Boosted

Replying to @NT4C.pl :

I clicked follow ;) have a peaceful day

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@tristanhali

Print Profile

Spool core v1 + Rings v1 [old version -> not recommended]

great idea but just doesn't seem to work well at all

The profile uploader has replied

@NT4C.pl

Thanks for the feedback! The first version had some stability limitations - I’ve now released V2, where the mounting system was redesigned and the parts lock together securely 🔧✨ Please give the new version a try - it should work much better 👍

(Edited)

@tristanhali

Replying to @NT4C.pl :

will print some off and give them a go mate!

(Edited)

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