Modular Hanging Filament Spool Rack (Curtain/Closet Rod)

This is my remix of the original filament spool hanger, updated into a modular “rack” system so you can build one row or multiple rows of hanging spools on a standard closet or curtain rod.

It’s intended for common up-to-1kg filament spools and is compatible with bagged/vacuum-bagged spools, as long as your bag size/shape still allows the spool to hang freely.

Why this remix

The original design works well, but I wanted a version that:

• Uses less filament

• Prints faster

• Can be expanded into a multi-row rack, not just single hangers

Modular system

• Horizontal linking: extend the row to hold more spools

• Vertical linking: stack additional rows beneath the first
  Build it as wide and as tall as your rod height and storage space allow.

Parts

You can build a simple single row, or stack multiple rows.

Core parts

• Hanger Hook: hooks over the rod and supports the rack.

• Hanger Top (top row): mates to the Hanger Top and provides sockets for spacers.

• Hanger Bottom (additional rows): row extender used to add more rows below.

Span and connection parts

• Hanger Spacer (65mm): crossbar that spans between two hangers. The spool rests on these.

• Hanger Spacer (65mm, double): used to chain multiple bays in a row (optional).

• Hanger Connector (65mm): coupler for joining spacers or making custom spacer runs.

• Hanger Connector Pins: press-fit pins that lock connectors/spacers together (print extras).

Assembly Guide

1) Build your top row (minimum setup)

Place (2) Hanger Hook parts on your rod at the spacing you want.

To connect two or more Hanger Top parts:

1. Insert a Hanger Top into the circular slot of each Hanger Hook.

2. Bridge between the two hangers using Hanger Spacer (65mm) pieces.

You have two common options:

• Option A (most straightforward): Use a Hanger Spacer (65mm) bay between that pair.

• Option B (fewer parts for long rows): Use Hanger Spacer (65mm, double) to connect the pair and continue extending the row so another set of hangers can be connected using Connector Pins.

2) Extend the row (add more spools left-to-right)

Option A: Simple chaining

• Repeat another pair of Hanger Hook + Hanger Top.

• Add another Hanger Spacer (65mm) bay between that pair.

• If you need to join spacer segments, use a Hanger Connector (65mm) plus Connector Pins.

• Keep adding “pairs” of hangers to extend the row.

Option B: Use Double Spacers

• Use Hanger Spacer (65mm, Double) in the middle runs.

• Use Hanger Spacer (65mm) to terminate the ends.

3) Add additional rows (stack downward)

1. On each hanger position, attach a Hanger Bottom beneath the existing row module.

2. Add spacers across the new row, the same way as the top row.

3. Repeat to add as many rows as you want, keeping clearance for spools and bags.

4) Add labels (optional)

1. I used 6mm (0.23") P-touch TZE-S211 Tape to print the labels (12 pt font I placed on the bottom of the front  Hanger Connectors.

Fit / compatibility notes

• Hanger Hook are designed to fit a 26mm closet/curtain bar (check the original model for the max supported rod diameter if you are near the limit). Let me know if you need a different size and I'll do my best to create/add different size hooks as needed.

• Always sanity-check clearance: spools should not rub the wall and your rod should be securely mounted.

Print recommendations

These are conservative “strength-first” defaults:

• 0.4 mm nozzle

• 0.15 to 0.20 mm layer height

• 3 perimeters (or more if you prefer)

• 15% infill (gyroid or grid)

• Supports: only if your printer/orientation requires them

Material: PLA works, but PETG is a safer choice for long-term load and warmer spaces.

Credits

Remixed from the original filament hanger model. If you like this remix, please also like the original.