Closet Rod Filament Rack Storage System

This is a modular, scalable filament storage rack system designed to turn any standard closet rod into a high-capacity filament storage unit.

The system uses a 1 inch hardwood dowel as the load-bearing shaft and a set of identical printed rack supports that clip over a closet rod. With just two printed parts, you can create a rack capable of holding up to 25 filament spools. By adding additional duplicate center supports, the system scales to virtually unlimited length.
 

This is not a simple hanger. It is an adjustable rack architecture that solves multiple problems at once:

Uses existing closet infrastructure

Scales without redesigning or reprinting unique parts

Supports heavy filament loads safely

Keeps spools accessible, visible, and organized

The design is print-in-place, requires no supports, and prints as a single solid part. It has been extensively tested in real-world filament storage setups.

This is a novel system design developed by Silent Cartography, created to address storage use cases not solved by traditional wall-mounted racks or single-spool hangers.

NOTE: Tolerances are tight and wood changes. If your in a humid environment you may want to go upscale a Percent
 

Key features
- Turns any closet rod into a filament storage rack
- Modular system using identical repeated parts
- Holds up to ~25 spools with only two prints
- Scales indefinitely with additional center supports
- Designed for 1 inch hardwood dowels
- Strong triangular load-bearing geometry
- Print-in-place
- No supports required
- Single-piece, tested design
- Longer than 3 feet may require an additional part printed and fit to he center

Recommended print settings
- Printer type: FDM
- Material: PLA or PETG
- Layer height: 0.2 mm
- Infill: 25 to 35 percent
- Walls: 3 to 4 perimeters
- Supports: None
- Orientation: Print flat as provided
- PETG is recommended for heavier loads or warmer environments