Polishing Media SCT – High Alumina Bright Polishing Media
Polishing Media SCT is a high-alumina ceramic abrasive media made by HuaTong Polish from α-alumina as the main crystal phase with a ceramic binder, cut to shape and finalized by high-temperature calcination. It delivers an elaborate, bright finish — the ideal final-polishing step after rough and moderate polishing of metal and non-metal workpieces.
Key Specifications
| Main component | Al2O3 (α-alumina) |
| Density | 2.9 g/cm³ |
| Moh’s hardness | ≥ L8 |
| Attrition rate | 0.2% |
| Available mesh | 800, 1500 |
| Shapes | ACT, SCT, BALL, ACC, SCC, ACTS |
| Color | White, green, red, yellow, etc. |
| Size | Ball 1–20 mm; other shapes 3×3 mm to 30×30 mm |
| Packing | 25 kg/woven bag |
Applications
High-alumina media is used for the elaborate polishing of metal and non-metal surfaces — increasing smoothness and brightness after rough and moderate polishing. It is especially effective at repairing scratches on part surfaces during bright polishing.
Why Choose HuaTong High-Alumina Media
- Bright, refined finish — restores surface smoothness and luster.
- Scratch repair — removes fine surface marks during bright polishing.
- Low attrition (0.2%) — durable and economical for finishing runs.
Note: high density with relatively low cutting force; use a corundum media like Corundum Media SCT for initial deburring before finishing
Frequently Asked Questions
What finish can I expect with high-alumina media?
High-alumina media is a finishing media that increases surface smoothness and brightness, and can repair fine scratches during bright polishing. It is typically the final step after rough and moderate polishing.
What mesh sizes are available?
It is available in 800 and 1500 mesh, suited to fine polishing. Choose based on your required surface finish.
Can I use high-alumina media for deburring?
It has relatively low cutting force, so it is not the best choice for heavy deburring. Use a corundum media (e.g. ACT or SCT) for deburring, then finish with high-alumina media.