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When your project demands a material that conducts reliably, machines cleanly, and holds its shape under pressure, finding the right copper disc blank in the exact size you need can be a real challenge. Whether you are a jeweler, an electrician, a machinist, or a hands-on maker, these solid pure copper discs give you a ready-to-use starting point — no rough cutting, no guesswork on thickness.
Each disc is cut from solid pure copper stock, offering a warm reddish surface and consistent density throughout. Thickness ranges from 3.5mm to 6mm (approximately 0.14 in to 0.24 in), and outer diameters span 10mm to 300mm (approximately 0.39 in to 11.81 in), covering a wide range of project requirements. The flat, uniform faces make these discs ready for further machining, stamping, or finishing straight out of the package.
Typical applications include copper electrode blanks for EDM machining, custom jewelry disc blanks for hand-stamping and metalsmithing, electrical bus bar or contact pads for DIY electronics, decorative inlay rounds for woodworking projects, and heat spreader discs for thermal management builds. The combination of thickness and diameter options makes these copper round plates a versatile raw material for small workshops and serious makers alike.
| Material | Solid Pure Copper |
|---|---|
| Shape | Round Disc / Blank |
| Outer Diameter Range | 10mm – 300mm (0.39 in – 11.81 in) |
| Thickness Range | 3.5mm – 6mm (0.14 in – 0.24 in) |
| Surface Finish | See variant options |
| Tolerance | See variant options |
| Quantity per Order | See variant options (1 pcs or 2 pcs) |
| Weight | See variant options |
| Conductivity | High electrical and thermal conductivity (pure copper) |
| Machinability | Compatible with HSS and carbide tooling |
Start with your finished part dimensions and add material for any machining or finishing you plan to do. For jewelry blanks, match the disc diameter to your desired pendant or coin size. For electrical contacts or heat spreaders, match the diameter to your mounting footprint and choose a thickness that provides the mass or conductivity your design requires. Use the Size (Thick x Diameter) selector above to find your combination.
These discs are made from solid pure copper, not brass (copper-zinc) or bronze (copper-tin). Pure copper delivers the highest electrical and thermal conductivity among common copper-based metals, and it has the characteristic reddish color. If your application requires a specific alloy grade (such as C110 or C101), please contact us to confirm before ordering.
Yes. Pure copper is a widely used EDM electrode material due to its excellent electrical conductivity and ability to produce fine surface finishes on workpieces. These solid copper disc blanks can be machined to your required electrode profile. Thicker discs (5mm–6mm) are generally preferred for EDM electrode stock to allow for re-facing over multiple uses.
Pure copper naturally oxidizes when exposed to air and moisture, developing a darkened patina over time. This does not affect structural integrity or conductivity in most applications. For decorative uses where a bright finish is desired, apply a clear lacquer or wax coating after polishing. For electrical applications, the oxide layer can be removed with a light abrasive or contact cleaner before assembly.
Yes. Pure copper machines well with standard HSS (high-speed steel) or carbide tooling. Use sharp tools, moderate speeds, and a cutting fluid or lubricant to prevent work-hardening and achieve a clean finish. Copper can be drilled, turned on a lathe, milled, filed, and sanded using conventional workshop equipment.
The Qty(pcs) option lets you choose how many discs you receive per order. Selecting 2 pcs means you will receive two discs of the chosen size in a single order — useful when you need a matched pair or want a spare. The price shown reflects the total for the selected quantity. Note that the 2 pcs option is available for select smaller sizes.
Absolutely. Copper disc blanks are a popular choice for hand-stamped jewelry, etched pendants, and decorative metalwork. The flat, uniform surface accepts stamps, punches, and engraving tools cleanly. Smaller diameters (10mm–50mm) in the 3.5mm–4mm thickness range are well-suited for pendants and charms, while larger discs work for decorative plates and wall art.
