Hydra - Enhanced Bambu Lab AMS (Single Piece - For Large Printers)

Notice!

This is only compatible with the original AMS. Please view my other designs for designs supporting other AMS systems, there are plenty.

Update May 7, 2026

 Hydra has been updated to version 1.12. Changes:

• RFID performance greatly improved, holders tilted back and up which aligns better with the spool tags for a more reliable reading.

• RFID board sockets and hex cutouts completely redesigned.

• Aligned the two rear screw holes, they were previously a tiny bit off.

• AMS main board mounting improved.

When using spools with RFID tags, it's recommended to use the optional spool guides.

 Please use the print profiles if you can, they're tried and tested with correct print settings and supports.

Update March 9, 2026

Hydra has been updated to version 1.11. Changes:

• 1.5 mm narrower total width, making it easier to fit in the AMS box without squeezing it in.

• Front rollers slightly larger cutout for the bearings.

• Small adjustment to the AMS main board mount.

• RFID friction fit mount optimized.

Please use the print profiles if you can, they're tried and tested with correct print settings and supports.

Update February 1, 2026

Hydra for the original AMS has been updated to version 1.10, it's the first update of the series for a very long time and as it's largely based off the newer Hydra for the AMS 2 PRO so it comes with some nice improvements, especially support for even wider spools and PTFE tubes replaceable from the top.

Changes:

• Rebranding, Hydra AMS is now known as Hydra - Enhanced Bambu Lab AMS to avoid confusion and for which AMS system this is for.

• Feeders tilted back to clear very full spools (avoids very full spools hitting the feeder or load button).

• New: PTFE tubes replaceable from top.

• New: Removable and reversible front and rear spool guides.

• Improved rear roller positions, allowing for slightly larger diameter spools.

• Optimized Hydra tray position and placement of the front locking tabs.

• You must use some manual supports, see instructions below. If you're uncertain, please use the print profiles where all of this is prepared.

• New built-in support boxes, these prevent the side walls of the main print from warping. Previously, the supports were just low infill waste prints but these new boxes are very much usable (and stackable!), there will be containers and add-ons for these soon, see the pic below, the orange boxes. You must still use some manual supports, see instructions below. If you're uncertain, please use the print profiles where all of this is prepared.

Support

All my designs and mods on Printables are free to use and remix. They have a non-commercial license. If you enjoy this or any of my other designs you can send me a small donation using the link below. Thanks :)

https://www.paypal.me/humebeamengineering

About

Optional but recommended files to print:

• High Capacity AMS Silica Dry Box to keep filament dry. Compatible with both Hydra and Bambu Lab AMS.

• PTFE Load Buttons to both save the funnels and improve ergonomics.

• Adjustable Spool Holder for Silica Gel / Spool Weight - Compatible with both Hydra and Bambu Lab AMS. 

This is a remix of the current Hydra but for large printers with a +300 mm wide print bed. If you have a 350 mm wide bed or larger you can print it normally and do not have to rotate it, if your bed is 300 mm wide exactly you need to rotate it 45 degrees in order for it to fit.

Print Settings

Print the parts in the direction I have set them. I recommend using a wide brim for improved bed adhesion and Nano Polymer if you have some. The parts are tall and quite narrow.

I recommend using a minimum of 3 walls, top and bottom and an infill of 15% or higher. I've printed all my Hydra prototypes with a 0.40 mm nozzle and a layer height of 0.20 mm on my H2D with otherwise mostly stock settings. Supports are needed for the rear motor mount and for the wall just above it.

Hydra has built-in support boxes to prevent warping, do not remove these! Instead set the wall count to 1 wall and use an infill of 5% to save some material on these (using the Object settings in the slicer). If you're uncertain just print the Print Profiles I've made where this is all prepared. 

I've marked them in red here:

The boxes are fully functional and stackable.

Notice: If you're uncertain please use the Print Profiles where this is all set correctly and it's tried and tested!

Use dry filament.

Assembly Instructions

Download the assembly guide for your version in the files section or follow the guide here. If you're unsure which version you have, the version number is printed in the front right part.