The High Speed Steel Burs, Size 34 (11 mm) Heart 45° is a premium, heavy-duty cutting tool engineered for professional jewelers who require maximum precision, power, and durability for advanced stone-setting and metal-shaping applications. Crafted from superior High Speed Steel (HSS), this large-format bur delivers exceptional strength, long-lasting sharpness, and reliable cutting performance even under continuous high-speed use.

With a 45° heart-shaped cutting geometry, this bur is ideal for creating deep, secure stone seats, wide undercuts, and accurate shaping for larger jewelry designs. The 11 mm (Size 34) diameter provides an extended cutting surface, perfect for shaping heavy settings, large bezels, thick bands, pendants, and dimensional metalwork where precision and material control are essential.

The spiral-cut fluting ensures smooth material removal, reduced heat generation, and consistent cutting flow. This advanced flute design helps prevent clogging and delivers a clean, refined finish on both soft and hard metals. The bur features the industry-standard 3/32″ (2.35 mm) shank, making it fully compatible with professional flex shafts, micromotors, and high-precision rotary tools used in jewelry workshops.

Designed for stone setters, engravers, fabricators, and master bench jewelers, this bur combines accuracy, power, and long tool life—making it an essential tool for shaping and preparing large, secure gemstone settings with professional-level results.

Key Benefits

• Superior Strength & Durability: High Speed Steel construction ensures extended tool life and exceptional heat resistance.

• Accurate 45° Heart Profile: Produces clean, precise shaping for deep stone seats and wide undercuts.

• Smooth, High-Efficiency Cutting: Spiral flutes reduce clogging, improve chip flow, and maintain cooler cutting temperatures.

• Large 11 mm Diameter: Ideal for heavy settings, thick metals, larger stones, and advanced jewelry shaping.

• Standard 3/32″ Shank: Compatible with leading flex shafts and rotary tools used by professional jewelers.

• Professional Performance: Creates clean contours, deep seats, and secure stone settings with minimal refinement needed.