Niqua® 23 Tool Steel Burs Round

Mill precision bearing seats, pre-drill stone settings, and texture precious metal surfaces with high concentric accuracy and clean chip clearance. Manufactured in Germany by NIQUA—leveraging over 125 years of specialized toolmaking expertise—the NIQUA® SUPER Q® Ball Bur "23" is the bench-standard round milling cutter for professional goldsmiths, diamond setters, and jewelry manufacturers.

Forged from premium hardened tool steel, each spherical bur features precision-ground spiral flutes designed to ensure smooth, chatter-free cutting without grabbing or skidding on the workpiece. The optimized tooth geometry evacuates metal swarf efficiently, preventing clogging and heat buildup when cutting soft precious metals such as yellow gold, sterling silver, copper, and brass. Built with a standard 2.35 mm (3/32") shank, these round burs fit all standard flexible shaft handpieces, brushless micromotors, and quick-change bench systems. Available in a full size progression from micro-drilling diameters through heavy seat-clearing profiles (0.30 mm to 10.00 mm / Ref: 03-200-003 to 03-200-100), they are packaged in protective bench boxes containing 6 pieces per box (with the heavy-duty 10.00 mm / 03-200-100 supplied as 4 pieces per box).

Why Choose NIQUA® SUPER Q® Ball Bur "23"

• Precision-Ground Spherical Fluting: Uniformly spaced spiral cutting teeth deliver smooth rotary engagement, allowing you to mill true spherical bearing seats for gemstones without faceted ridges.

• High Concentric Running Accuracy: Precision-machined shanks minimize radial runout, eliminating handpiece vibration and preventing delicate prong deformation under magnification.

• Clog-Resistant Chip Clearance: Optimized flute gullets quickly evacuate metal shavings away from the cutting zone, keeping teeth sharp and clear during long milling passes in ductile precious metals.

• Hardened German Tool Steel: Delivers long-lasting edge retention and wear resistance under continuous daily jewelry workshop use.

• Standard 2.35 mm (3/32") Shank: Drops directly into standard jeweler flex shaft handpieces, quick-change chucks, and precision micromotors.

• Complete Size Range: Offered from micro-piercing 0.30 mm diameters up to large 10.00 mm hollow-carving heads for comprehensive bench versatility.