Adapter spool for 140mm filament spools

It had been bothering me for some time that I couldn't use the 250g spools in my Creality Space Pi filament dryer because they didn't rest on the two intended ball-bearing rollers but rather between them on the bottom of the housing; therefore I designed this adapter spool for the 250g spools.

The spool is capable of holding 140mm spools with a width of 44mm and an inner diameter of 52mm. The outside diameter of the spool flange is 200mm and it has an assembled overall width of 66mm, so it should also fit into the Bambu AMS, and also offers the option of attaching an OpenPrintTag to the outside, as shown in the pictures. The spool flange has a perforated mesh in the middle, and the screw-on connecting sleeve also has three meshes around its circumference, allowing the interior to be used either as space for desiccant packets or granules, or for old batteries or fishing weights as additional weight.

The three spring strips attached to the sleeve are centering the coil while the three springs attached to the inside of the flange ensure a central positioning between the two flanges. Assembly is quite simple, as you can see in the following video:

I made 3 variations of the flange, one color only, 2 color with base logo and material text on the inside (>PETG<) colored black using MMU painting of the single color flange model and finally a 3 color version with full colored logo and colored material text. The material text is editable according the used material, so you will be reminded what material you have used for it before before you choose your drying temperature. 

I recommend to print all spool parts at least in PETG or ABS/ASA or even PC (which I didn’t try to be honest), I made a test with PLA and the flanges deformed during drying PETG at the contact point with the rear roller that is right beside the hot air outlet on the bottom of the Space PI dryer.

I printed the single color parts like the sleeve and the flange on my CoreOne, the multi color parts and the spring parts I printed on my Mk3.5S with MMU3.

Due to the thin wall thickness of the flange springs I printed the spring parts with 0,25mm nozzle and 100%infill

For the flange and the sleeve I used the 0,2mm structural profile, but to end up with satisfying prints there are some more additional adjustments to make, so I uploaded 3mf files of the flange and the sleeve with all my settings for each part piece.

Use a material that is dried and tuned in properly in order to end up with well printed parts.

I hope you find my design useful and wish you Happy Printing !