20mmx16mm Fine Grit Diamond Concave Cylinder Drill Bits

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

1. Drill Bits:

   • Drill Tip: Concave diamond-coated surface for clean, smooth holes in hard materials (Diamond Core Drills).

   • Shank Sizes: 6mm – Compatible with rotary tools (Rotary Tools) and pendant drills (Drilling Systems).

   • Material Compatibility: Jade, agate, amber, turquoise, and stones with Mohs hardness ≤7 (Gemstones).

2. 6mm Shank Concave Grinding Head:

   • Material: Synthetic diamond abrasive.

   • Grit: 150# (coarse) / 400# (fine) – For progressive material removal (Abrasive Grits).

   • Dimensions:

     • Shank Diameter: 6mm

     • Outer Diameter: 20mm

     • Groove Width: 2mm–12mm (adjustable for precise contouring).

   • Cooling Requirement: Water-cooled operation (Cooling Systems).

   • Applications: Jade, agate, ceramics, crystal, and glass beads (Glasswork).

Key Features

• Concave Design: Minimizes chipping and ensures centered holes for delicate beads (Precision Tools).

• Diamond Coating: Long-lasting performance on hardened stones (Diamond Abrasives).

• Versatility: Suitable for organic materials (bone, shell) and ceramic components (Ceramic).

Applications

1. Bead Drilling: Create uniform holes in bracelet beads (Beads) for stringing.

2. Surface Grinding: Shape and smooth gemstone cabochons (Cabochons).

3. Jewelry Repair: Precision drilling/grinding for broken pendants (Jewelry Tools).

Usage Guidelines

• Speed: 5,000–10,000 RPM for drilling; ≤15,000 RPM for grinding.

• Cooling: Always use water lubrication (Cooling Accessories).

• Safety: Wear protective eyewear (Safety Gear) and secure workpieces firmly.

Why Choose These Tools?

• High Precision: Achieve mirror-finish holes (Polishing Systems) and smooth contours.

• Durability: Diamond coating resists wear in high-friction tasks (Grinding Tools).

• Efficiency: Drill/grind multiple beads without tool changes.

Complementary Products:

• Bead Polishing Kits: Diamond Compound Paste

• Flexible Shafts: Rotary Tool Accessories

• 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.