The High Speed Steel Burs, Size 30 (8 mm) Heart 45° is a premium, heavy-duty cutting tool engineered for professional jewelers who require maximum precision and controlled cutting performance for larger stone settings and advanced metal shaping. Manufactured from high-grade High Speed Steel (HSS), this bur provides exceptional hardness, durability, and extended cutting life even under continuous high-speed use.

With a 45° heart-shaped cutting profile, this bur is designed to produce accurate stone seats, deep undercuts, relief cuts, and smooth metal shaping essential for large gemstone settings, sculpting, and precision fabrication. The Size 30 (8 mm) diameter is ideal for removing larger volumes of metal while maintaining excellent stability and control. Its wide cutting surface makes it perfect for shaping heavy rings, thick bezels, wide bands, pendants, and custom jewelry structures.

The spiral-fluted cutting pattern ensures smooth chip removal, reduces heat buildup, and maintains clean cutting throughout extended use. This design prevents clogging and enhances efficiency, giving professional jewelers reliable performance every time. The industry-standard 3/32″ (2.35 mm) shank ensures compatibility with all flex shafts, micromotors, and rotary tools used in professional jewelry workshops.

Ideal for stone setters, engravers, casters, and custom fabricators, this Size 30 heart bur delivers high-precision shaping, cleaner contours, deeper cutting capability, and excellent tool control for demanding jewelry applications.

Key Benefits

• Exceptional Durability: High Speed Steel construction ensures long-lasting sharpness and superior heat resistance.

• Accurate 45° Heart Profile: Ideal for deep stone seats, undercuts, wide contours, and precision shaping.

• Smooth, Clean Cutting: Spiral flutes prevent clogging and provide consistent chip evacuation.

• Large 8 mm Diameter: Size 30 delivers excellent control for heavy-duty shaping and larger gemstone seats.

• Professional Compatibility: Standard 3/32″ shank fits all major jeweler’s rotary tools.

• High-Performance Results: Produces clean surfaces, precise cuts, and reduces finishing time.