76.5mm Stacker
Built for America the Beautiful 5 oz coins and ultra-large specialty rounds
Overview
Design
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Dimensions
| Feature | Value |
|---|---|
| Inner Diameter | 76.5 mm |
| Base Diameter | 82.0 mm |
| Total Height | 75.0 mm |
| Cap Height | 15.0 mm |
| Tube Height | 60.0 mm |
| Base Recess | -0.5 mm |
| NFC Badge Slot | Ø25 mm × 1 mm (snap-fit) |
- Primary Use: America the Beautiful 5 oz coins and ultra-large specialty rounds
- Part Numbers:
- Tube: ‘T-76’
- Cap: ‘C-76’
Compatible Coins
| Coin Name | Diameter | Thickness | Mint |
|---|---|---|---|
| America the Beautiful (5 oz) | 76.2 mm | 4.06 mm | United States Mint |
| Ultra-large specialty rounds | ~76 mm | varies | Various private mints |
Note: This stacker is specifically designed for the America the Beautiful (ATB) 5 oz coins, which are among the largest diameter bullion coins produced. The wide, shallow design accommodates the unique ATB dimensions.
Specifications
- Recommended Coin Diameter: 75.0-76.5 mm
- Typical Coin Thickness: ~4.0-5.0 mm (ATB coins are wider but thinner)
Capacity
- Standard tube (60.0 mm height): Holds ~12–15 ATB coins depending on thickness
- Designed specifically for America the Beautiful 5 oz coins
- Accommodates the unique wide, shallow profile of ATB coins
- Perfect for ATB series collectors
- Can also hold ultra-large specialty rounds of similar dimensions
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 America the Beautiful 5 oz coins (76.2mm diameter)
- Maximum stability with 82 mm base for the wide coin profile
- Reinforced vertical stacking capability
- Ideal for ATB series collectors
- Important: ATB coins have a unique wide, shallow profile (76.2mm × 4.06mm). The shorter tube height accommodates approximately 12-15 coins. Ensure magnets and NFC tags are seated securely before long-term storage.
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-76.stl) - Cap STL file (
C-76.stl) - NFC badge (
badge-76.5.stl) - 2× Ceramic/Ferrite magnets (25 mm × 4 mm)
- 1× NTAG215 NFC tag