0.3mm SDC Diamond Grinding Internal Points Rod

The Stone Carving Sintered Diamond Bur is a heavy-duty precision tool engineered for high-speed grinding, and material removal on ultra-hard substrates like carbides, industrial ceramics, sapphire, and advanced composites. Featuring a sintered metal bond that permanently bonds  diamond particles, it delivers unmatched durability and stability under extreme mechanical stress. Sintered Diamond Drill Bit is a high-performance tool engineered for precision drilling in hard materials such as stone, glass, ceramics, and gemstones. Its unique double bevel design enhances both centering and cutting efficiency, making it ideal for clean and accurate hole-making in lapidary and industrial applications. 6mm shaft diamond Grit: 46Grit, including:

•  Cylinder Round End  Cylinder, and Flat End Cylinder for versatile grinding and shaping;
• Ball Shape and Round Ball Shape for detailed carving and concave surfaces;
• Flat Head,  Flat End, and Flat Shape for surface polishing and flat area finishing;
• Bullet Shape for fine-detail carving and deep grooves;
• Drum Shape for edge finishing and curved surface work;
• Tapered  Cone, Inverted Cone, Flat End Inverted Cone, and Flat Head Inverted Cone for precision shaping and intricate detailing;
• Flat Wheel Shape and Wheel for smooth surface polishing and edge work; 
• Point and Internal  Points Rod for fine detailing, engraving, and internal hole finishing; 
• Bead and Concave Bead for specialized bead shaping and concave surface finishing;
• Bevel and Double  Bevel Drill Bit for high-performance drilling and accurate hole-making in hard materials;
• File and Shape Bur for groove shaping, surface refinement, and material removal.

Applications

• Aerospace & Defense: Machining tungsten carbides components or ceramic armor.
• Tool & Die Making: Sharpening industrial -grade cutting tools or mold cores.
• Electronics Manufacturing: Precision shaping of semiconductor substrates or optical fibers.
• Lapidary & Jewelry: Detailing synthetic gemstones or hardened alloys, carbides, industrial ceramics, and sapphire.
• Speed: 10,000–30,000 RPM (varies by bur size).
• Cooling: Mandatory use of coolants to prevent thermal damage.