90x40mm Round End Cylinder Diamond Bur, 5pcs – 36 Grit 6mm Shank Heavy-Duty Carving Tool for Gemstone, Stone & Glass

Heavy-duty industrial 90x40mm Round End Cylinder Diamond Burs (6mm Shank, 5-Piece Set) engineered for aggressive stock removal, deep channel carving, cavity hogging, and heavy-duty contouring in ultra-hard lapidary and masonry materials. Coated with extra-coarse 36-grit industrial diamond matrix securely bonded onto a rigid 6mm heat-treated steel shank.

Key Specifications

• Dimensions: 90x40 mm
• Head Shape: Cylinder with Round End (Ball Nose Dome Cylinder)
• Shank Diameter: 6 mm (Standard heavy-duty rotary tool & die grinder fit)
• Grit: 36# Extra Coarse (Rapid stock hogging and rough shaping)
• Abrasive / Bond: Premium Industrial Diamond / Heavy-Duty Electroplated
• Quantity: 5 pieces per set

Recommended Applications

• Rough hollow carving, deep channel excavation, and large-format gemstone contouring
• Stone sculpting, granite/marble profiling, and ceramic tile edging
• Glass sculpturing, heavy beveling, and cast deburring
• Weld smoothing, casting cleanup, and hard metal shaping

Usage Guidelines

• Always operate with continuous water coolant or liquid lubrication to prevent matrix overheating and ensure maximum service life.
• Recommended operational speeds: 8,000 – 18,000 RPM. Maintain consistent feed pressure without forcing.