Filament Spool Divider (Fusion360 parametrized design)

Filament Spool Divider

If you have many filament spools in your storage and each of them has small amount of filament remaining on it, this model saves your storage space a lot. (Well, I'm preparing for publishing filament rewinder dedicated for the divided spools.)

It is printable on a single plate with a small amount of material ~100g even for a four-section divider.

Two-section and three-section dividers are also provided which requires even smaller amount of materials (37g and 66g).

The standard version requires a bed size larger than ~200mm x 120mm to print a pair of the model at once.

For smaller bed sizes, for example 180mm x 180mm, split versions are also provided. It requires a minimum bed size of ~160mm x 130mm to print a pair of the model at once.

The split versions are designed to self-support overhanging parts. So, cut off the supports by nippers after printing.

Requirements

• An empty filament spool with an internal width and core diameter that is in the following list:
                 
  • Internal width 56 mm with core diameter 90 mm (w56cd90).
  • Internal width 57 mm with core diameter 80 mm (w57cd80).
  • Or any other sizes: They are supported by the parametrized Fusion360 design file.
  • I will provide new stl files for other sizes on request, too.
    
    
     
• Some superglue that can glue the printed parts on your empty filament spool.
  • For non-split version, even without glue, the divider parts are fixed on the spool when the filaments are wrapped on it.

Inspired by

• This design was inspired by “Customizable filament spool divider” by VolkerMueller.
  https://www.printables.com/model/134603-customizable-filament-spool-divider
   
   
• The fast-printable zero-retraction structure of the dividing blades was learned from “Silica-Gel-box (spool-container, optimized for super fast print)” by 3D_Workspace.
  https://www.printables.com/model/669387-silica-gel-box-spool-container-optimized-for-super
  

Points of innovation

• The parametrized design fits any size of your empty spools, hopefully.
• Two-section, Three-section and four-section dividers are provided.
• Minimal usage of filament
  37g for two-section divider, 66g for three-section divider, and 100g for four-section divider.
• Fast printable on a single plate (> 160mm x 130mm).
  • No need to print many parts on multiple plates.
  • Set line width to 0.6 mm with 0.4 mm nozzle for the best result. See below.

 The dividing blades have fast-printable zero-retraction structure with 0.6 mm line width, that provides enough stiffness with minimal materials.

Printer setting

• INCREASE LINE WIDTH TO 0.6 mm when you use a 0.4 mm nozzle, to make the divider blades printed as single walled.
• You can also increase line height, for example, to 0.25 mm, for faster printing.
• Painted brims on the ends of the footprint ("Brim ears") helps stable printing.
• No support is required. Roughness on overhanging parts does not affect functionality. (The split version contains required supports in the model.)

File name notation

• w12cd34od56div2 means:
  • width 12mm
  • core diameter 34mm
  • outer diameter 56mm
  • two-section divider
• w12cd34od56div2s means:
  • if the name is ended with “s”, that is a split version
  • otherwise, it is normal version

Updates

• 2025-07-28B
  • Enlarge filament catch size a little to insert the filament easily.
• 2025-07-28A
  • Added Fusion 360 parametric design file.
  • Added two-section dividers.
  • Added split version that is printable on a 180mm x 180mm bed.
• 2025-07-03
  • Initial publication