The High Speed Steel Ball Burs Size 17 (4.3mm) Round is a high-precision cutting tool engineered for professional jewelers who require exceptional control, consistent performance, and clean, accurate results during heavy-duty metal shaping. Constructed from premium high-speed steel (HSS), this large 4.3mm round bur delivers powerful cutting action, long-lasting sharpness, and superior durability, making it ideal for deeper cavity creation and extensive shaping work.

The 4.3mm spherical head is specifically designed for removing larger volumes of metal while maintaining smooth cutting flow and surface accuracy. It is perfect for forming large stone seats, contouring metal surfaces, creating deep recesses, and performing advanced material removal tasks during jewelry manufacturing and repair. Its geometry allows controlled cutting with minimal heat buildup, protecting the integrity of precious metals such as gold, silver, platinum, brass, and other alloys.

Engineered with spiral-cut precision flutes, this HSS ball bur ensures stable rotation, clean chip removal, and smooth engagement even under high-speed use. The standard 3/32" (2.35mm) shank ensures full compatibility with industry-standard flex shafts, micromotors, and rotary handpieces.

This larger-size bur is highly efficient for creating uniform cavities, smoothing curved surfaces, refining channel cuts, and shaping custom jewelry designs. Designed for professionals, it maintains cutting performance through repeated use, reducing downtime and enhancing workflow productivity.

The High Speed Steel Ball Burs Size 17 (4.3mm) Round is the ideal tool for jewelers who demand reliability, precision, and superior metal removal capability in their bench work.

Key Benefits

• Large 4.3mm precision ball head delivers powerful, controlled metal removal.

• Ideal for creating deep stone seats, broad recesses, and curved cavities.

• High-speed steel design ensures extended tool life and reliable cutting performance.

• Smooth, vibration-free cutting for cleaner results and reduced finishing time.

• Compatible with all professional rotary tools, flex shafts, and micromotors.

• Maintains sharpness even with repeated use on hard jewelry metals.