3D Printing Guide

Coinfinity Stackers were designed to be 3D printed. They take a while to print and have magnets embedded inside. Learn how to 3D print your Coinfinity tubes, bins, lids, and bases after purchasing/acquiring the official STL models.

STL Files

Available for purchase:

Each purchase includes STL files for:

Stackers:

  • Tube model
  • Cap model

Bins:

  • Bin model
  • Lid model

Bases:

  • Base model

✅ Files are licensed for personal use
🧾 Need a commercial license? Contact us at: Email Us

General Print Settings

  • Material: PETG recommended
    PETG is superior to PLA for applications like 3D-printed holders for precious metals (e.g., silver and gold) due to its enhanced chemical stability, lower moisture absorption, and greater durability. Unlike PLA, which degrades via hydrolysis and releases acidic residues (potentially accelerating silver tarnish in 2–5 years through outgassing and a hygroscopic nature absorbing 1–2% moisture), PETG remains inert with minimal VOCs or acidity, absorbing only 0.1–0.5% moisture and resisting breakdown for 10–50+ years in controlled environments (30–50% RH, 60–70°F). It offers higher heat resistance (70–80°C vs. PLA’s 50–60°C), impact toughness, and UV stability, preventing physical failures like cracking that could expose items to contaminants. Backed by polymer studies (e.g., in Polymer Degradation and Stability), PETG minimizes tarnish risks to near-zero for silver over decades, making it ideal for archival storage—though it requires more careful printing (e.g., heated enclosure to avoid stringing). For optimal results, use pure brands like Prusament and add inert liners if direct contact is a concern.

  • Layer Height: 0.2 mm
  • Infill: 20–30%
  • Supports: Not required (if oriented correctly)

Filament Choices

Use any color filament you like! Here are some example builds:

🖤 Black Silk Stackers

Black Stackers

❤️🖤 Crimson Red / Black

Crimson Red/Black Stackers

🤍 Standard White

Standard White Stackers

Printing Instructions

  1. Print tubes upright (standing vertically)
  2. Print caps upside down (top side down on the build plate)
  3. Add pause for magnet insertion (magnets optional)
  4. Orient tubes so seams are hidden at the back
  5. No supports needed if oriented correctly
  6. Group prints: Place caps in the front and tubes in the back to track magnet polarity
  7. Insert magnets with correct polarity – see Magnets
  8. Check each model’s page for unique instructions
  9. Review the printing guides for each type below

Quality Tips

  • Use high-quality PETG
  • Clean your build plate before printing
  • Use an enclosure if printing PETG
  • Stainless steel nozzle not required, even for magnet-embedded models, see Magnets

Printing the Stackers

Next: Printing the Stackers

Printing the Bins

Next: Printing the Bins

Printing the Bases

Next: Printing the Bases

Printing an army of stackers

Want to print a large batch?

  • Split caps and tubes onto separate build plates
  • This saves time and helps with magnet polarity tracking
  • Organize rows consistently for large-volume production

Additional Resources

📏 See Supported Stacker Sizes for exact dimensions and compatibility.

If you have trouble, you can reach out to the COINFINITY Discord server for assistance.

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