The High Speed Steel Bur – Size 26 (6.3 mm) Inverted Cone is a heavy-duty, high-precision tool engineered for jewelers, engravers, and craft professionals. Made from durable high-speed steel (HSS), it’s built to withstand high-RPM use while retaining sharpness, giving you reliable performance even under demanding conditions.

With its large 6.3 mm head, the inverted cone shape excels at contouring, undercutting, shaping, and finishing work. This makes it ideal for applications where you need to remove more material efficiently while maintaining control—whether you’re refining castings, smoothing large grooves, or sculpting larger design elements.

The robust 3/32″ shank fits standard rotary handpieces, flex-shafts, and micromotors, making it a versatile addition to any jeweler’s toolkit. Its wide surface area supports faster material removal without sacrificing the finesse required for clean, professional finishes.

Constructed from high-speed steel, this bur offers excellent heat resistance and stays sharper for longer than cheaper options, helping reduce the overall cost per use. Whether you’re working on metal, wood, plastic, or stone, this Size 26 inverted cone bur is built for both power and precision.

Key Benefits

• Premium HSS construction for extended tool life and reliable performance

• Large 6.3 mm inverted cone head for efficient shaping and material removal

• Precision undercutting and contouring for clean, professional finishes

• Stable at high speeds — ideal for high-RPM workshops

• Universal 3/32″ shank ensures broad compatibility with jewelry tools

• Versatile material use — works on metal, wood, plastic, and stone