6061 Round Aluminum Sheet Disc Plate Dia 100/150/200/300mm Thick 1/2/3/4/5~10mm

Measure the opening or footprint your disc needs to cover or fit into, then add any overlap or flange allowance. For speaker baffles, match the disc to the driver's outer frame diameter. For gaskets, match the disc to the flange OD and plan to bore the center hole after delivery. When in doubt, order one size up — it is easier to turn down a larger blank than to add material.

For purely decorative face plates or cover discs with no load, 1–2 mm is typically sufficient. For structural spacers, bearing retainers, or parts that will be tapped and bolted, 3–6 mm provides a more reliable thread engagement depth. For heavy-duty fixtures or heat-sink bases with significant clamping force, 8–10 mm offers the rigidity needed to prevent deflection.

6061-T6 forms a natural oxide layer that resists moisture and mild atmospheric corrosion well in most outdoor settings. For prolonged marine or salt-spray exposure, anodizing or painting the disc significantly extends its service life. If your application involves continuous saltwater immersion, consider 5052 or 5083 alloy instead, which offer superior marine corrosion resistance.

Yes. 6061 aluminum accepts both Type II decorative anodizing and Type III hard anodizing without issue. For powder coating, clean and etch the surface with an aluminum-compatible pre-treatment before applying primer. The mill-finish surface may show minor tool marks after anodizing — if a mirror finish is required, sand to 320–400 grit before sending to the anodizer.

Standard HSS or carbide drill bits work well with aluminum. Use a cutting fluid or WD-40 to reduce heat and prevent the bit from loading up with aluminum chips. For tapping, use a spiral-flute tap designed for non-ferrous metals and apply cutting oil generously. Thinner discs (1–2 mm) may flex during drilling — back them with a sacrificial wood block clamped to your drill press table.

If you are prototyping a single part or need one replacement piece, the 1 Pcs option minimizes cost. For small production runs or when you want a spare in case of a machining error, 2 Pcs is a practical choice. The 5 Pcs pack offers the best per-unit value for batch projects, classroom use, or when you regularly consume the same size. Note that not all diameter and thickness combinations are available in every quantity — check the variant selector for available combinations.

The discs are deburred before packaging, so edges are not razor-sharp. However, freshly cut aluminum can still have minor burrs or slight sharpness depending on the cutting method. We recommend wearing light work gloves when handling, especially with thinner discs where the edge-to-face ratio is higher. If you plan to handle the discs frequently, a quick pass with 220-grit sandpaper on the edge takes only seconds and eliminates any residual sharpness.