2.5mm Bullet Shape Diamond Bur, 20pcs – 400 Grit 2.35mm Shank Precision Carving Tool for Gemstone, Stone & Glass

Precision industrial 2.5mm Bullet Shape Diamond Burs (2.35mm Shank, 20-Piece Set) engineered for delicate carving, intricate contouring, detail relief engraving, and fine cavity hollowing in ultra-hard lapidary materials, gemstones, glass, and ceramics. Coated with premium 400-grit electroplated diamond abrasive bonded securely onto a 2.35mm (3/32") precision steel shank.

Key Specifications

• Head Diameter: 2.5 mm
• Head Shape: Bullet Shape (Pointed / Tapered Dome Head)
• Shank Diameter: 2.35 mm (3/32" standard rotary tool & micro motor fit)
• Grit: 400# Fine Grit (Smooth contouring, fine detailing, pre-polish shaping)
• Bond / Abrasive: Electroplated / Industrial Diamond Matrix
• Quantity: 20 pieces per pack

Recommended Applications

• Micro-carving, detailed facial features, and fine lines in jade, agate, quartz, and gemstones
• Glass etching, precision engraving, and porcelain/ceramic detail work
• Intricate mold detailing, miniature sculpting, and precision jewelry finishing

Usage Guidelines

• Always operate with continuous water coolant or liquid lubrication to prevent matrix overheating and ensure maximum service life.
• Recommended operational speeds: 10,000 – 30,000 RPM. Maintain light, consistent pressure.