Classification and Selection of Diamond Powder for Polishing
July 24, 2025
Diamond powder is a crucial abrasive material widely used in precision polishing, grinding, and lapping applications across industries such as optics, electronics, and jewelry. Due to its exceptional hardness (10 on the Mohs scale), diamond powder ensures superior surface finishes on hard materials like ceramics, glass, tungsten carbide, and gemstones. However, selecting the right diamond powder requires understanding its classification based on particle size, shape, and bonding methods. Classification of Diamond Powder • By Particle Size (Grit Size) Diamond powder is categorized by micron (µm) or mesh size, which determines its cutting efficiency and final surface finish: – Coarse Grit (45–100 µm / 170–325 mesh)–Used for rapid material removal and rough polishing. – Medium Grit (10–45 µm / 325–1500 mesh)–Ideal for intermediate polishing stages. – Fine Grit (0.5–10 µm / 3000–50,000 mesh)–Used for ultra-precision finishing and mirror-like surfaces. • By Crystal Shape – Blocky (Irregular) Diamond–Provides aggressive cutting, suitable for rough grinding. – Sharp (Angular) Diamond–Delivers efficient material removal in mid-stage polishing. – Round (Spherical) Diamond–Produces smooth finishes in fine polishing applications. • By Manufacturing Method – Natural Diamond Powder–Mined and crushed, offering high durability but inconsistent shapes....
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