Diamond Concave Cylinder Drill Bits & Grinding Heads for Bead Bracelet Jewelry is a Precision diamond-coated tools for drilling and grinding beads, gemstones, and jewelry components. Ideal for bracelet crafting (Beadwork) and spiritual jewelry repair.
Technical Specifications
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Drill Bits: - 
Drill Tip: Concave diamond-coated surface for clean, smooth holes in hard materials (Diamond Core Drills). 
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Shank Sizes: 6mm – Compatible with rotary tools (Rotary Tools) and pendant drills (Drilling Systems). 
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Material Compatibility: Jade, agate, amber, turquoise, and stones with Mohs hardness ≤7 (Gemstones). 
 
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6mm Shank Concave Grinding Head: - 
Material: Synthetic diamond abrasive. 
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Grit: 150# (coarse) / 400# (fine) – For progressive material removal (Abrasive Grits). 
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Dimensions: - 
Shank Diameter: 6mm 
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Outer Diameter: 20mm 
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Groove Width: 2mm–12mm (adjustable for precise contouring). 
 
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Cooling Requirement: Water-cooled operation (Cooling Systems). 
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Applications: Jade, agate, ceramics, crystal, and glass beads (Glasswork). 
 
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Key Features
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Concave Design: Minimizes chipping and ensures centered holes for delicate beads (Precision Tools). 
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Diamond Coating: Long-lasting performance on hardened stones (Diamond Abrasives). 
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Versatility: Suitable for organic materials (bone, shell) and ceramic components (Ceramic). 
Applications
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Bead Drilling: Create uniform holes in bracelet beads (Beads) for stringing. 
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Surface Grinding: Shape and smooth gemstone cabochons (Cabochons). 
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Jewelry Repair: Precision drilling/grinding for broken pendants (Jewelry Tools). 
Usage Guidelines
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Speed: 5,000–10,000 RPM for drilling; ≤15,000 RPM for grinding. 
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Cooling: Always use water lubrication (Cooling Accessories). 
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Safety: Wear protective eyewear (Safety Gear) and secure workpieces firmly. 
Why Choose These Tools?
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High Precision: Achieve mirror-finish holes (Polishing Systems) and smooth contours. 
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Durability: Diamond coating resists wear in high-friction tasks (Grinding Tools). 
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Efficiency: Drill/grind multiple beads without tool changes. 
Complementary Products:
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Bead Polishing Kits: Diamond Compound Paste 
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Flexible Shafts: Rotary Tool Accessories 
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Bead Cleaning Brushes: Finishing Tools 
Customizable Packaging: Select options (grit, size) from the dropdown menu.
Note: For bulk orders or technical support, contact HANS Lapidary. Ideal for jewelers demanding flawless precision in bead crafting and repair.
 
            