The High Speed Steel Ball Burs Size 16 (4mm) Round is a high-performance cutting tool designed for professional jewelers who require exceptional precision, durability, and clean cutting results. Constructed from premium high-speed steel (HSS), this bur offers extended tool life, superior sharpness retention, and consistent cutting performance across various jewelry-making applications.
The 4mm round head provides a larger cutting surface, ideal for creating smooth rounded cavities, shaping metal surfaces, carving deep recesses, and preparing stone settings that require broader removal of material. Its perfectly balanced spherical geometry ensures stable operation, reduced vibration, and controlled material removal, even at high rotational speeds.
With spiral-cut precision flutes, this HSS ball bur delivers efficient chip clearance, smoother cutting, and minimal heat buildup—preventing metal damage and prolonging tool life. The standard 3/32" (2.35mm) shank guarantees compatibility with all professional flex shafts, micromotors, and rotary handpieces used in jewelry workshops.
Made for use on gold, silver, platinum, brass, and other jewelry alloys, this 4mm ball bur performs exceptionally well for shaping bezels, sculpting domed surfaces, hollowing metal, and refining larger design areas. Its durability and clean cutting action make it indispensable for both production-level bench jewelers and fine-detail craftsmen.
The High Speed Steel Ball Burs Size 16 (4mm) Round is engineered for precision, long life, and professional-grade reliability—an essential tool for achieving smooth, accurate, and consistent results in advanced jewelry work.
Key Benefits
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4mm precision round head for larger, smoother cavity shaping
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High-speed steel design ensures long-lasting sharpness
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Smooth, controlled cutting with reduced heat buildup
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Ideal for professional metal carving and stone setting
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Reliable performance across all jewelry metals