Rings · Jewelry / Casting / 3D
Plain Ring Band
A 4 mm wide plain band, 1.8 mm thick, with softened edges. Choose a US size from 4 to 13 before downloading.
Download
Heartline Works Original Design. Free to use for personal projects and for products you make and sell. Please do not resell, share or redistribute the design files themselves, alone or in a pack.
- Size
- 20.9 × 20.9 × 4 mm
- Model volume
- 412 mm³ (0.412 cm³)
- File formats
- STL, OBJ
- Best for
- Lost-wax casting patterns, prototypes and sizing models. Check wall thickness, shrinkage and your caster's minimums before production.
- Materials
- Casting wax; Castable resin; Lost-wax casting in silver, gold, brass or bronze; Resin or filament 3D print (for a pattern or prototype)
- Machines
- Resin / wax 3D printer; Lost-wax casting workflow; 3D CAD for editing (Rhino, Blender, Fusion 360, MatrixGold or similar)
- Software
- 3D files (STL, OBJ) open in slicers and 3D programs that read those formats, such as Blender, Rhino, Fusion 360 or MatrixGold. Program names are examples of software that reads the format, not tested guarantees.
- Licence
- Heartline Works Original Design
- Source
- Original design by Heartline Works, constructed from geometry; no third-party artwork, fonts or traced images.
- Design ID
- plain-ring-band
File check
- Mesh checked closed: every edge is shared by exactly two triangles; 2,880 triangles at full resolution; units are millimetres.
Always make a test cut or a test print on scrap before production. Kerf and shrinkage differ from machine to machine.
Estimated casting weight
Metal weight is volume × density. These estimates use the model volume above and typical alloy densities, before sprues, shrinkage and finishing.
| Metal | Density | Estimated weight |
|---|---|---|
| Sterling silver 925 | 10.36 g/cm³ | 4.26 g |
| Gold 14K (typical yellow) | 13 g/cm³ | 5.35 g |
| Gold 18K (typical yellow) | 15.5 g/cm³ | 6.38 g |
| Platinum (pure) | 21.45 g/cm³ | 8.83 g |
| Brass (typical) | 8.5 g/cm³ | 3.5 g |
| Bronze (typical) | 8.8 g/cm³ | 3.62 g |
For wax or resin pattern weights and custom densities use the casting weight calculator. Models with overlapping parts count the overlap twice, so treat the figure as an upper estimate.
Ring sizes
| US size | Inside diameter | Circumference |
|---|---|---|
| 4 | 14.88 mm | 46.8 mm |
| 5 | 15.69 mm | 49.3 mm |
| 6 | 16.51 mm | 51.9 mm |
| 7 | 17.32 mm | 54.4 mm |
| 8 | 18.13 mm | 57 mm |
| 9 | 18.95 mm | 59.5 mm |
| 10 | 19.76 mm | 62.1 mm |
| 11 | 20.57 mm | 64.6 mm |
| 12 | 21.38 mm | 67.2 mm |
| 13 | 22.2 mm | 69.7 mm |
Inside diameter = 11.63 mm + 0.8128 mm × US size. Add shrinkage allowance for your casting process.