Reusable Filament Spool for Bambulab and new eSun (Bambulab compatible) Refills

This is version 2.0 of my previously released BambuLab-compatible reusable spool. I have made several improvements based on suggested improvements from users most notably PhilH. Thank you Phil.

The new features and improvements include: - tapered core for easier loading and unloading - improved internal geometry reduces print time and material - compliant indexing tab allows both halves to be identical - six filament anchoring holes for more convenient winding of filament - AMS and non-AMS versions (so you can print it with color text or single color)

The spool consists of two identical halves which you print and then mate by simply twisting them together. This new version has a compliant indexing nub which moves out of the way on one side and indexes the filament core on the other side. There is a detent to hold them in position but you can reverse twist them to separate the halves just as easily. They also can be nestable for storage

I have included a printable snap-on label card for marking what filament is in the spool. The card also has some slots so if you remove a partially used spool you can zip-tie the label to the partial spool before putting it in storage. The card can snap onto multiple locations and on either side of the spool.

Another feature I added which is out there but I did not like how it was done on the ones I looked at was the ability to add zip-ties to the partially used filament roll before removing it from the spool. I made the side slots for inserting the zap strap extend to inside the spool diameter, where there is a space for the strap to pass under the filament core. And, then I created offsetting additional space that allows the re-useable spool to be twisted and separated without interference with the now-installed zip-tie.

Lastly, I added more holes for inserting the end of the filament to tie it down. It always bothered me that some of the spools from the manufacturers have very few holes in the sides so you have to unspool some filament to reach the hole. Not a big deal… unless you are OCD. ugh.

100% printed - no hardware, fasteners, or adhesives required. No support is required.

Print Settings

For the best results, I suggest the following: Material = I recommend PLA or PETG but any material should work. Nozzle = 0.4mm Layer Height = 0.2mm Line Width = 0.4mm Wall Count = 4 (1.6mm) Top and Bottom Layer Count = 5 Detect Thin Walls = ON Wall Generator = Arachne Infill = 40% (Cubic) Ironing = Not required Support = None required Print orientation = As per the STL/3MF files.

Related Links

I also have made a spool for:

eSun (older style/size) https://than.gs/m/999752

Das Filament https://than.gs/m/1142092

Visit my blog for more details and other designs: https://www.logicalplanet.com/

Revisions and Updates I occasionally update and revise my designs. When I do, I’ll document the changes here. Check back periodically for the latest revision notes or if you’re experiencing any issues with a model.

2025-05-11: I have revised the spool so that the previously radial filament anchoring holes are now parallel to the filament direction. I have made this change on the advice of someone else who explained this is appropriate. I welcome feedback. I have left the filament anchoring holes in the walls. I also added the label card which I had previously forgotten.

2025-12-20: I have made a few more improvements including this new version 2.03 has a much improved indexing nub.