Simple, parametric wire spool holder for common small spools (AliExpress / Amazon types like Fermerry 20AWG sets).

Instead of keeping wires in flimsy boxes or loose on rods, this design stores each spool in a compact box with an internal core so the spool can rotate freely while feeding wire. The side opening allows smooth dispensing and a quick way to secure the wire end.

What’s different from the original

This is a full redesign based on the idea from HakiP’s modular spool holder:

• No screws required

• Strong snap-fit assembly (tested in PLA, PETG, ABS)

• Fully parametric design (Fusion 360)

• Adjustable to fit different spool sizes

Enter your spool dimensions and generate a perfectly fitting box.

Key Features

• Snap-fit closure — no hardware needed

• Fully parametric — adapts to different spool sizes

• Wire exit slot with retention

• Stackable / modular concept

• Clean print — no supports needed

• Spool holder - Interrnal rotating core (!Optional: designed for easy rewinding; accepts a flat-head screwdriver) But Plastic rotates smoothly on Plastic :D 

Printing

• Layer height: 0.2 mm

• Perimeters: 2 ( Tested )

• If you Use 4 Top/Bottom there is no need for Infill

• Material: PLA / PETG / ABS

Tested with:

• Prusament PLA, PETG

• LDO ABS

All snap fits work reliably with proper tolerances, some force needed! :) 

Important

Before printing:

• Spool holder - Interrnal rotating core is an optional component if you use it
  either:

  • Use a little support or

  • Place the cut faces on the build plate

• Repair if your slicer requires it

(Prepared examples included in the 3MF)

Parametric Setup

The model is fully parametric. To fit your spool, adjust these values:

• Spool_Flange_Diameter – outer diameter of the spool

• Spool_Barrel_Diameter – inner core diameter If you do not use the spool holder leave it!

• Spool_Overall_Width – total width of the spool

• Spool_Flange_Thickness – thickness of one flange

Everything else updates automatically.

Additional parameters:

• Wiggle_Room – adds clearance for easier insertion/removal

• Wall_Thickness – adjust strength vs. material usage

Scaling

The design can be scaled for smaller or larger spools using the parametric values.

For larger or heavier spools:

• Increase Wall_Thickness

• Adjust Wiggle_Room if needed

Customization

• CAD files included (Fusion 360)

• Fully editable parametric design

You can also emboss labels (AWG, length, etc.) on the top — example shown in the included 3MF.

Need a Custom Size?

If you don’t use CAD or don’t want to deal with the parametric setup, feel free to leave a comment with your spool dimensions:

• Spool_Flange_Diameter

• Spool_Barrel_Diameter

• Spool_Overall_Width

• Spool_Flange_Thickness

I’ll try to generate the model for you and upload it to a folder.

There are many different spool variants (especially from unbranded/Chinese manufacturers), and most don’t provide exact specs, so community input helps expand compatibility.

Notes

• Designed for small hobby wire spools (e.g. 14-30AWG sets)

• Tolerances are tuned for easy snap-fit assembly

• If parts are too tight or loose, adjust Wiggle_Room slightly

• The Spool holder - Interrnal rotating core is optional. It was part of the original design I remixed and is included if you want a dedicated axle to help manually rewind your wire. If you are stacking the modules and don't need the rewind feature, you can skip printing the core. Plastic spools on Plastic just slide.

Also Thanks sooo much for checking this model out, do not forget to see the original model. Have a nice day, and leave a comment what I can improve or add to make it even better. I just learned parametric designing for this model, but ironed out all the issues. Or I hope ;)