Premium sintered diamond concave bead bur with 6mm shaft. Inner diameters: 12mm, 16mm, 20mm, 25mm. Ideal for grinding round beads, half-spheres, and Buddha beads from marble, granite, wax, and other hard materials.
Key Specifications
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Product Name: Sintered Diamond Concave Bead Bur
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Shank Diameter: 6mm
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Inner Sizes Available: 12mm, 16mm, 20mm, 25mm
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Manufacturing Process: Full Sintered Diamond Grit
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Compatible Tools: Die grinders, rotary tools, flex shaft machines
Applications
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Bead Carving: Ideal for shaping and hollowing round beads such as Buddha beads, prayer beads, and decorative spheres
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Half-Sphere Shaping: Perfect for forming domes, eyes, and hemispherical stone features
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Material Compatibility:
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Natural Stones: Marble, sandstone, granite
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Semi-precious materials: Amber (beeswax), jade
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Ceramics and other hard materials
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Product Features
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✅ Full Sintered Diamond Grit – Long-lasting performance and superior wear resistance
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✅ Precision Inner Diameter – Accurate concave shaping for consistent bead production
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✅ Heavy-Duty Construction – Designed for extended use on hard stone and ceramic materials
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✅ 6mm Shaft – Compatible with most rotary tools, handheld grinders, and Dremel-style tools
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✅ Versatile Uses – Excellent for lapidary work, jewelry making, and sculpture detailing
Usage Tips
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🔧 Sharpen Before First Use: Lightly grind on a firebrick or dressing stone to expose fresh diamond grit
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💧 Use with Water or Coolant: Prevents overheating and prolongs tool life
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🧤 Safety First: Always wear goggles and gloves when operating at high RPM