Type: Type 27 (Depressed Center) Application: Grinding of metal, welds, steel, cast iron, ferrous alloys Abrasive Material: Aluminum oxide / Zirconia alumina / Silicon carbide (depends on model) Wheel Diameter: 100 mm, 125 mm, 180 mm, 230 mm (common sizes) Thickness: 4 mm to 7 mm (varies by size) Bore Hole Diameter: 16 mm, 22.23 mm, or as per specification Speed Rating: 6,000 to 13,300 RPM (depends on size) Max Operating Speed: 80 m/s Bond Type: Resin bonded, reinforced with fiberglass mesh Shape: Depressed center for better operator visibility and flush grinding Usage: Angle grinders (manual use) Application Area: Heavy-duty metal fabrication, construction, foundry, shipyard, and welding industries