Stainless Steel Blank Discs — Laser-Cut Round Plates for Precise DIY & Fabrication Work
When your project demands a flat, true-round metal blank with clean edges right out of the package, standard hardware-store offcuts rarely make the cut — literally. Hobbyists, fabricators, and workshop professionals who need repeatable geometry without grinding or filing turn to laser-cut stainless steel blank discs to save setup time and get consistent results across every piece.
These stainless steel blank discs are cut from 304-grade stainless steel sheet and are available in outer diameters from 50 mm (approx. 2 in) up to 350 mm (approx. 13.8 in), with wall thickness options spanning 0.5 mm through 10 mm. Each disc is laser-cut to a tight dimensional tolerance, leaving a smooth, burr-minimised edge that requires little to no secondary finishing for most applications.
Typical use cases include custom gasket blanks and sealing discs for plumbing or HVAC work, decorative medallions and sign blanks for laser engraving or etching, structural backing plates and load-spreading washers in furniture and equipment assembly, and art or jewellery blanks where a consistent round starting point is essential.
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Compatibility note: These discs are solid flat blanks with no pre-drilled holes. Drilling, tapping, or further cutting is the buyer's responsibility. Verify your required diameter and thickness before ordering — see variant options above.
✅ Key Features of These Stainless Steel Blank Discs
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🔵 304 Stainless Steel Construction — Offers solid corrosion resistance in both indoor and outdoor environments, including exposure to moisture and mild chemicals.
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✂️ Laser-Cut Precision Edges — CNC laser cutting produces a consistently round profile with minimal burr, reducing the need for secondary deburring on most projects.
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📐 Wide Size Matrix — Diameters from 50 mm to 350 mm (2"–13.8") paired with thickness options from 0.5 mm to 10 mm give you a single source for a broad range of blank sizes.
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🛡️ Flat, Stress-Relieved Surface — Sheet stock is sourced in flat-rolled form; laser cutting does not introduce the warping associated with plasma or oxy-fuel cutting at these thicknesses.
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⚙️ Machinable & Weldable — 304 stainless accepts standard HSS and carbide tooling for drilling and tapping, and is compatible with TIG and MIG welding processes.
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🎨 Suitable for Surface Finishing — The mill-finish surface can be sanded, brushed, polished, powder-coated, or left as-is depending on your application requirements.
📐 Technical Specifications — Stainless Steel Blank Discs
| Material |
304 Stainless Steel |
| Shape |
Round disc (no holes) |
| Outer Diameter Range |
50 mm – 350 mm (approx. 2" – 13.8") |
| Thickness Range |
0.5 mm – 10 mm (approx. 0.02" – 0.39") |
| Cutting Method |
CNC Laser Cut |
| Surface Finish |
Mill finish (2B or equivalent) |
| Edge Condition |
Laser-cut, burr-minimised |
| Hole Pattern |
None (solid blank) |
| Diameter Tolerance |
Typically ±0.2 mm (see variant options) |
| Variant Dimension |
See variant options |
| Weight |
See variant options |
❓ Frequently Asked Questions
How do I choose the right diameter for my project?
Measure the finished outer diameter you need, then select that size from the variant dropdown. Because these are solid blanks with no pre-drilled holes, you have full freedom to drill, cut, or machine the disc to your final shape. If you need a disc that will be turned down on a lathe, order the next size up to allow for material removal.
Which thickness should I choose for a structural backing plate?
For light-duty load-spreading applications (furniture bolts, equipment feet), 2–3 mm is typically sufficient. For higher-load structural uses or where rigidity is critical, 5–10 mm provides meaningfully greater stiffness. When in doubt, consult a structural engineer for load-bearing applications.
Are these discs corrosion-resistant enough for outdoor use?
304 stainless steel offers good corrosion resistance in most outdoor environments, including rain and humidity. However, it is not fully immune to rust in coastal or high-chloride environments — for those conditions, 316-grade stainless is generally recommended. The mill-finish surface can also be passivated or coated for additional protection.
Can I weld or drill these discs?
Yes. 304 stainless steel is weldable using TIG or MIG processes with appropriate filler wire (ER308L is common). It is also machinable with standard HSS or carbide drill bits — use cutting fluid and moderate speed to avoid work-hardening the surface. Always clamp the disc securely before drilling.
Are the edges safe to handle straight out of the package?
Laser-cut edges are significantly smoother than shear-cut or plasma-cut edges, but thin discs (0.5–1 mm) can still have a sharp perimeter. We recommend wearing cut-resistant gloves when handling any metal disc, especially thinner gauges, until you have inspected and optionally deburred the edge to your satisfaction.
Can I use these as engraving or etching blanks?
Yes — the flat mill-finish surface is well-suited for laser engraving, chemical etching, and rotary engraving. For the cleanest engraving results, lightly sand the surface to a consistent 180–320 grit finish before processing. Thinner discs (0.5–2 mm) are popular for jewellery and decorative tags; thicker discs (3 mm+) work well for signage and plaques.
What is the dimensional tolerance on the outer diameter?
CNC laser cutting typically holds an outer diameter tolerance of ±0.2 mm at these sizes, though actual tolerance may vary slightly with thickness. If your application requires tighter tolerances, the disc can be finish-turned on a lathe after purchase. Contact us to confirm specifications for critical-fit applications.
🛒 Select your Diameter x Thickness above, then add to cart.
