4 Inch Diamond Flat Lap Disc 100mm Grit 320 Coated Grinding Disk With Five Eighths Inch Arbor For Gemstones Jewelry Glass Rock Tile And Knife Carving And Knife Making Projects

4 Inch Diamond Flat Lap Disc for Lapidary, 100mm
✔️ 4 in dia, 100 mm, 5/8 in arbor, grit 320, water friendly

This 4-inch diamond flat lap disc is designed for precision grinding in lapidary work, gemstone fabrication, glass shaping, and small metal tasks. It features a dense diamond coating and a perfectly flat surface for true faceting and edge finishing. These discs fit standard 5/8" arbor grinders and are ideal for use with water cooling to extend life.

✅ Outside diameter: 4 inch (100 mm)
✅ Arbor hole: 5/8 inch (16 mm)
✅ Thickness: 1.1 mm (0.043 in)
✅ Grit: 320 (Medium)
✅ Diamond coating density: high; surface coverage ~95% on coated side
✅ Compatible: 5/8" arbor, angle grinder suitable
✅ Recommended use: grinding gemstones, jewelry, glass, rock, carving knives
✅ Quantity: 1 piece

💡 What is a diamond flat lap disc used for in hobby lapidary and glass grinding?

Diamond flat lap discs are handy tools for precise material removal and finishing, delivering a flat, parallel surface for clean, true edges.

• handy for faceting material and lapidary grinding where precision matters
• works with water cooling to extend life and prevent overheating
• fits standard 5/8 inch arbor grinders for easy setup