Magnets

Magnets can enhance your Coinfinity stacking system by adding secure, magnetic alignment to bases, stackers, and caps—making your storage more satisfying, stable, and modular.

These magnets cost around $0.13 each, making them an affordable and fun upgrade.

⚠️ Note: Magnets are completely optional!
If you skip them, your slicer will simply fill the magnet wells with solid print material.

Why Add Magnets?

✅ Pros

  • Makes stackers snap together with alignment and a satisfying click
  • Adds stability to tall stacks or top-heavy tubes
  • Allows accessories like magnetized caps or trays
  • Feels more polished and premium

❌ Cons

  • Magnets can be dangerous if swallowed—keep away from children and pets
  • Adds complexity to printing (requires inserting during the print or pausing to place)
  • Slight interference with NFC scanning (don’t place magnets directly behind the tag)
  • Can accidentally affect magnetic strips or sensitive electronics if placed nearby
  • Not ideal when full of metal: heavy stacks of coins reduce the effectiveness of magnets

Magnets are embedded INSIDE each stacker tubes and caps.

Paused for Magnets Magnets Inserted

Add a Pause to the layer that covers up the magnet wells. The printer will pause at the layer where the magnets are inserted. Resume the print once magnets are inserted.

👍 Tip: SET A TIMER!! If done quickly and cleanly, you shouldn’t see any layer lines at the pause layer. The longer the part has to cool, the higher the odds of a layer line forming. Especially with Silk style filaments..

Magnets Covered Mid-Print

Safety Guidelines

  • Keep magnets away from electronics, magnetic storage media (e.g. credit cards), and pacemakers
  • Store securely — magnets can attract and snap together forcefully, which can pinch skin
  • Never ingest — magnets can be extremely dangerous if swallowed

Magnet Specifications

We recommend using 1” ceramic (ferrite) magnets — these are safe, inexpensive, and easy to install. The magnets we recommend have a “dimple” on one side to denote N/S polarity.

  • Type: Grade 5 Ceramic / Ferrite Magnet (not neodymium)
  • Size: 1” (25.4mm) diameter × 4mm thick
  • Strength: ~2800 Gauss
  • Cost: ~$0.13 per magnet
  • Source: Amazon – 50 or 120 Pack

🧲 Do not use neodymium magnets—they’re stronger, but more dangerous and not needed for Coinfinity!

How to Insert Magnets

There are two main approaches:

🔹 During Print (with Pause)

Use your slicer’s “pause at layer” feature (often called Magnet Pause) to automatically pause the printer when it reaches the magnet cavity.

  1. Slice your part
  2. Preview layers until you see the cavity just begin to close over
  3. Add a pause just before that point
  4. Insert the magnet(s)
  5. Resume the print

Make sure the magnet is flat and flush. You don’t want it to stick up into the next layer. Don’t push too hard as to make the buildplate move.

Polarity Matters!

Always install magnets with consistent polarity so all stackers attract properly.

We recommend:

  • South Pole (flat side) facing down
  • North Pole (dimple side) facing up

🧭 Tip: Just imagine in your head the upright position of each item that you print. The magnet dimple always faces up when it is in the correct position!

If you mix up polarity, your stackers may repel each other.

Printing Tips

  • Use a pause-at-layer feature for reliable magnet embedding.
  • Watch the first layer after inserting magnets to ensure they don’t shift

TL;DR

  • ✅ Use 1” × 4mm ceramic magnets (~$0.13 each)
  • ✅ Insert during print with pause
  • ✅ South side down, North side up
  • ⚠️ Keep away from NFC tags and electronics
  • ❌ Neodymium not recommended

Next: DIY Bill of Materials

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