The High Speed Steel Burs, Size 22 (5.2 mm) Heart 45° is a heavy-duty precision bur engineered for jewelers who require maximum cutting strength, stability, and accuracy when working with larger stone settings or deeper metal shaping. Manufactured from premium High Speed Steel (HSS), this bur offers exceptional durability, superior edge retention, and consistent high-speed cutting performance.

Designed with a 45° heart-shaped cutting profile, it is perfect for forming larger stone seats, creating controlled undercuts, refining contours, and carving deep relief cuts. The 5.2 mm (Size 22) diameter provides significant cutting depth and power, making it an ideal choice for medium-to-large gemstones, bold design details, and substantial material removal while maintaining precise control.

Its spiral-fluted cutting design ensures clean chip removal, reduces clogging, and minimizes heat buildup during operation. This results in smoother cutting, longer tool life, and improved performance when working on both soft and hard metals. Featuring the universal 3/32″ (2.35 mm) shank, this bur is fully compatible with professional flex shafts, micromotors, and rotary jewelry tools.

Perfect for master jewelers, stone setters, engravers, and metalworkers, this heart bur delivers professional-grade results for complex, detailed, and large-scale jewelry applications.

Key Benefits

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

• Precision 45° Heart Geometry: Provides accurate shaping and deep undercutting ideal for larger stone seats and heavy-duty detailing.

• Smooth, Controlled Cutting: Spiral flutes maintain clean chip flow and reduce heat buildup for consistent performance.

• Large 5.2 mm Size: Size 22 offers maximum cutting power for deep seats, heavy shaping, and bold design work.

• Standard 3/32″ Shank: Compatible with all major rotary tools used in professional jewelry settings.

• Professional-Level Accuracy: Creates clean contours, secure seats, and refined finishing with minimal effort.