The High Speed Steel Burs, Size 8 (2.3 mm) Heart 45° is a high-precision cutting bur designed for professional jewelers who require accuracy, reliability, and clean performance during stone setting and fine metal detailing. Crafted from premium High Speed Steel (HSS), this bur delivers superior edge retention, excellent hardness, and consistent cutting efficiency—even under continuous high-speed operation.

The 45° heart-shaped cutting design is engineered for precise stone seats, controlled undercuts, and detailed shaping essential for prong, bezel, micro-pavé, and flush settings. The 2.3 mm (Size 8) diameter offers a tight, versatile working size perfect for smaller stones, refined detailing, and delicate shaping tasks where precision matters most.

With spiral-cut flutes, this bur provides smooth cutting action, reduced clogging, and better chip evacuation—resulting in cooler operation and a cleaner finish. The standard 3/32″ (2.35 mm) shank ensures compatibility with all professional jewelry rotary systems including flex shafts and micromotors.

Ideal for stone setters, engravers, and bench jewelers, this heart bur supports flawless detailing, crisp cuts, and efficient workflow performance, making it a must-have for achieving top-tier craftsmanship.

Key Benefits

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

• Precision 45° Heart Angle: Designed for accurate stone seats, undercuts, and detailed jewelry shaping.

• Clean & Smooth Cutting: Spiral flutes reduce clogging, enhance chip removal, and keep the tool cooler.

• Versatile 2.3 mm Size: Size 8 is perfect for small stone settings, micro details, and fine metal refinement.

• Universal Compatibility: Standard 3/32″ shank fits all major rotary jewelry tools.

• Professional Finish: Enables clean contours, precise cuts, and reduced finishing time.