27.4mm Stacker

Designed for 1/2 oz gold coins and select 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 The Royal Mint
1/2 oz Gold Kangaroo 25.10 mm 2.20 mm Perth Mint
1/2 oz Gold Panda 27.00 mm 1.85 mm People’s Bank of China
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 United States Mint
1/2 oz Platinum Britannia 27.00 mm 1.80 mm The Royal Mint
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

  • Standard tube (74.0 mm height): Typically holds ~20–22 coins depending on thickness and whether capsules are used
  • Designed for 1/2 oz gold coins
  • Perfect fit for high-relief coins
  • Accommodates thicker commemorative pieces

Magnetic System

Magnet Type: Ceramic/Ferrite, 25 mm × 4 mm 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
  • Thick walls provide secure protection for valuable coins

Model Files

  • 3D models files are available on Cults 3D! Cults 3D

Navigation

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