The High Speed Steel Ball Burs Size 12 (3.1mm) Round is a precision-crafted cutting tool designed for professional jewelers who demand accuracy, control, and long-lasting performance. Constructed from premium high-speed steel (HSS), this bur provides superior sharpness, durability, and consistent cutting results across all fine jewelry metals.
The 3.1mm round head is perfect for larger cavities, gemstone seat shaping, undercutting, and detailed metal sculpting. Its precision geometry ensures controlled material removal, minimal heat buildup, and cleaner finishes on delicate surfaces. This makes it essential for prong seat preparation, bezel adjustments, metal shaping, and micro-detail carving in jewelry manufacturing.
Designed with spiral-cut precision flutes, this HSS ball bur allows smooth cutting, efficient chip removal, and reduced vibration even at high speeds. The standard 3/32" shank (2.35mm) provides universal compatibility with flex shafts, micromotors, and rotary handpieces used by professional jewelers.
Its robust steel composition maintains sharpness and performance across gold, silver, platinum, brass, and other common jewelry alloys, reducing frequent bur replacements and improving workflow efficiency.
The High Speed Steel Ball Burs Size 12 (3.1mm) Round is an indispensable tool for achieving precise, professional-grade results, making it a top choice for stone setters, engravers, and fine jewelry craftsmen.
Key Benefits
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3.1mm precision round head for larger cavities and gemstone seat shaping
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High-speed steel construction ensures long-lasting sharpness and durability
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Smooth, efficient cutting with minimal heat buildup
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Perfect for stone setting, carving, and detailed jewelry work
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Reliable, consistent performance for professional jewelers