The High Speed Steel Burs, Size 13 (3.3 mm) Heart 45° is a premium-quality bur engineered for professional jewelers who require accuracy, strength, and superior cutting performance. Crafted from durable High Speed Steel (HSS), this bur delivers long-lasting sharpness, consistent edge retention, and outstanding performance during continuous high-speed operation.

The 45° heart-shaped cutting geometry is specifically developed for stone seating, undercutting, and precise metal shaping in jewelry settings. With a 3.3 mm (Size 13) diameter, this bur offers increased cutting depth and a wider cutting face, making it ideal for medium-to-large gemstones, deeper seats, and advanced shaping tasks that require maximum control and precision.

Its spiral-cut flutes ensure smoother cutting action, reduced clogging, efficient debris removal, and cooler operation during extended use. This guarantees clean, accurate cuts while minimizing tool wear. The universal 3/32″ (2.35 mm) shank ensures seamless compatibility with all professional flex shafts, micromotors, and rotary jewelry tools.

Perfect for stone setters, engravers, and bench jewelers, this heart bur allows for flawless detailing, deeper seat formation, and professional-grade finishing across multiple metals including gold, silver, platinum, and brass.

Key Benefits

• Exceptional Durability: High Speed Steel construction provides long tool life and superior heat resistance.

• Precision Heart Profile: 45° geometry enables accurate stone seats, smooth undercuts, and refined shaping.

• Smooth Cutting Action: Spiral flutes reduce friction, remove debris efficiently, and maintain cool operation.

• Larger 3.3 mm Size: Size 13 allows deeper cuts and enhanced shaping control for medium-to-large stone settings.

• Standard 3/32″ Shank: Compatible with professional rotary tools and flex shaft systems.

• Professional Craftsmanship: Ensures cleaner settings, stronger stone security, and reduced finishing time.