27.4mm Stacker

Designed for 1/2 oz gold and 1/4 oz silver coins

Overview

27.4 Stacker

Design

27.4 Stacker

Dimensions

Feature Value
Inner Diameter 27.4 mm
Base Diameter 35.0 mm
Total Height 88.0 mm
Cap Height 14.0 mm
Tube Height 74.0 mm
Base Recess -1.5 mm
NFC Badge Slot Ø25 mm × 1 mm (snap-fit)
  • Primary Use: 1/2 oz gold coins
  • Part Numbers:
    • Tube: T-27
    • Cap: C-27

27.4 Stacker

Compatible Coins

Coin Name Diameter Thickness Mint
1/2 oz Gold Maple Leaf 25.00 mm 2.23 mm Royal Canadian Mint
1/2 oz Gold Britannia 27.00 mm 1.70 mm Royal Mint (UK)
1/2 oz Gold Kangaroo 25.10 mm 2.20 mm Perth Mint
1/2 oz Gold Panda 27.00 mm 1.85 mm China Mint
1/2 oz Platinum Maple Leaf 25.00 mm 1.80 mm Royal Canadian Mint
1/2 oz Platinum American Eagle 25.00 mm 1.75 mm US Mint
1/2 oz Platinum Britannia 27.00 mm 1.80 mm Royal Mint (UK)
1/2 oz Platinum Philharmonic 25.00 mm 1.20 mm Austrian Mint

Specifications

  • Recommended Coin Diameter: 26.5–27.5 mm
  • Typical Coin Thickness: ~2.1–2.3 mm

Capacity

  • Designed for 1/2 oz gold coins
  • Perfect fit for high-relief coins
  • Accommodates thicker commemorative pieces

Magnetic System

Magnet Type: Ceramic/Ferrite 1” (25mm) diameter × 4mm thick

  • Locations:
    • Lid (South polarity up / hole down)
    • Base (North polarity up / hole up)
  • Configuration: Embedded into each part during printing

NFC Integration

  • Tag Type: NTAG215 (25 mm round)
  • Placement: Inserted into badge slot after printing
  • Scan Area: NFC badge face
  • Compatibility: Most NFC-enabled smartphones

Technical Notes

  • Optimized for half-ounce gold coins
  • Magnets are embedded into each part during printing
  • Compact design maintains security while maximizing storage efficiency
  • Wall thickness provides optimal protection for valuable contents

Model Files

  • 3D models will be available soon on Makerworld! Makerworld

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Required Components

See the Bill of Materials for full details.

  • Tube STL file (T-27.stl)
  • Cap STL file (C-27.stl)
  • NFC badge (badge-27.4.stl)
  • 2× Ceramic/Ferrite magnets (25 mm × 4 mm)
  • 1× NTAG215 NFC tag