Eco-Modular Shelf for Cardboard Spools

Eco-Circular and Modular Shelf: Double-Locking Shelves

This modular shelving system gives new life to your cardboard spools. Unlike other designs, this one uses two-piece shelves that connect using a system of 4 precision studs, allowing for a firm assembly that fully embraces the circular edge of the spool

It can be made to your desired size, height, and number of rows, it's just a matter of having enough spools :)

🌟 Design Highlights

• Robust Connection System: The two halves are assembled using 4 studs that ensure the shelf does not separate under weight
• Perimeter Fit: By mounting on the circular edges, it leverages the spool's own structure to gain stability
• Bed Optimization: The two-piece design allows for printing large shelves

🛠️ Print Settings

For the studs to fit with the right pressure, I recommend:

• Material: PLA (for rigidity) or PETG (if you want the studs to have some elastic "memory").

🧩 Assembly Instructions

1. Joining Halves: Take the two shelf pieces and align the 4 studs. Press the stud until both faces are in contact (you can use a rubber mallet or a flat object to press evenly).
2. Fitting onto the Spool: Once the shelf is assembled, slide it over the circular edges of two cardboard spools with an inner diameter of approximately 54 mm.
3. Securing: The design is intended for friction alone to keep it in place. 
4. The spools are joined vertically with threaded pillars on a circular base that acts as a stand. Do not overtighten the pillars as they may break

⚠️ Legal Notice / Disclaimer

• Do Not Overtighten: When assembling the two pieces, press carefully; excessive brute force could break them.
• Responsibility: Designed for light storage and workshop organization. I am not responsible for breakages due to overloading or accidents resulting from the poor condition of recycled cardboard.