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Size of filament spool compartment  

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Jeroen
(@jeroen-3)
Eminent Member
Size of filament spool compartment

I like using 5kg spools, and I wonder if these will fit. How big is the spool compartment on the side of the printer? 

Best Answer by alphasigma:

https://www.printables.com/model/1520379-prusa-core-one-l-full-cad-assembly

A 5 kg spool will not fit within the "side compartment" and due its weight you need an appropriate spool holder with support on both sides...

Opublikowany : 26/02/2026 7:15 am
alphasigma
(@alphasigma)
Active Member
RE: Size of filament spool compartment

https://www.printables.com/model/1520379-prusa-core-one-l-full-cad-assembly

A 5 kg spool will not fit within the "side compartment" and due its weight you need an appropriate spool holder with support on both sides...

Core One L

Opublikowany : 26/02/2026 9:07 am
Jeroen
(@jeroen-3)
Eminent Member
Topic starter answered:
RE: Size of filament spool compartment

Thanks! Indeed, using the step-file I could confirm the 5kg spools I use do not physically fit in the spool holder compartment, even apart from the weight concern. So I'll just have to live with 1 or 2 kg spools.

Opublikowany : 26/02/2026 9:52 am
alphasigma
(@alphasigma)
Active Member
RE: Size of filament spool compartment

 

Posted by: @jeroen-3

Thanks! Indeed, using the step-file I could confirm the 5kg spools I use do not physically fit in the spool holder compartment, even apart from the weight concern. So I'll just have to live with 1 or 2 kg spools.

Why only with 1, 2 kg spools? Why not designing a holder for 5 kg spools placed next to the printer...or take an already designed one...? 

https://www.printables.com/search/models?q=5+kg+spool  

😉

Core One L

Opublikowany : 26/02/2026 12:37 pm
Jeroen
(@jeroen-3)
Eminent Member
Topic starter answered:
RE:
Posted by: @alphasigma

Why only with 1, 2 kg spools? Why not designing a holder for 5 kg spools placed next to the printer...or take an already designed one...? 

https://www.printables.com/search/models?q=5+kg+spool  

😉

Space reasons. I have a spool holder that fits my 5kg spools ( https://www.printables.com/model/293431-spool-holder-holding-up-to-large-3kg-spools ), but I don't have room for a Core One L and a spool holder side-by-side.

This post was modified 21 hours temu by Jeroen
Opublikowany : 26/02/2026 12:57 pm
alphasigma
(@alphasigma)
Active Member
RE: Size of filament spool compartment

This https://www.printables.com/model/1361348-2-kg-spool-support-for-core-one remixed for a 5 kg spool still too wide...? Sorry, never had a spool bigger than 1 kg in my hands...what are the dimensions of a 5 kg spool? Thx in advance!

Core One L

Opublikowany : 26/02/2026 2:09 pm
_KaszpiR_
(@_kaszpir_)
Noble Member
RE: Size of filament spool compartment

Personally I have a similar issue - a bit of lack of space on the sides, so I used LACK to stock things under the print. In the future will move with the spools to be placed above it, probably. Unfortunately those things get bigger and bigger....

See my GitHub and printables.com for some 3d stuff that you may like.

Opublikowany : 27/02/2026 7:46 am
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