Niqua® R(f) Tool Steel Burs Cylinder

Mill true flat planes, cut straight-walled slots and channels, and refine orthogonal contours with steady lateral guidance and minimal chatter. Manufactured to Swiss-Made precision standards for NIQUA, the NIQUA® SUPER Q® Cylinder Bur "R(f)" (Walzenfräser) is a heavy-duty precision rotary milling instrument engineered for goldsmiths, diamond setters, hand engravers, and precision toolmakers. 

Featuring an elongated, straight cylindrical body paired with radial end-cutting flutes across the flat tip and longitudinal flutes around the perimeter, the Series R(f) bur functions as a miniature end mill. Its fine-cut tooth geometry (f) delivers controlled material removal and smooth finishes, preventing aggressive grabbing or tool stalling in soft, ductile alloys such as yellow gold, sterling silver, platinum, copper, brass, and related non-ferrous metals. Machined from premium hardened tool steel, each bur maintains edge sharpness, low vibration, and uniform chip clearance during high-speed bench production. Built with an industry-standard 2.35 mm (3/32") shank, these cylindrical burs mount directly into jeweler flexible shaft handpieces, quick-change chucks, and precision brushless micromotors. Available in broad surface diameters from 3.00 mm to 6.00 mm (Item Numbers: 03 228 030 to 03 228 060), each size is packaged in a bench storage box containing 6 pieces. 

Why Choose NIQUA® SUPER Q® R(f) Cylinder Burs

• Dual-Action Face and Perimeter Milling: Precision-fluted flat end levels recessed floors, while the tall cylindrical body squares vertical walls and guides straight linear cuts. 

• Fine Cut (f) Tooth Architecture: Closer, finer-fluted teeth deliver controlled stock removal and smooth surface finishes, preventing aggressive grabbing or chatter in soft precious metals. 

• True 90° Orthogonal Alignment: Cuts perpendicular internal shoulders and right-angle walls for bezel boxes, wide channel settings, and structural jewelry joints. 

• Consistent Depth Regulation: The flat end face acts as a natural stabilizer against flat cavity bases, maintaining an even milling depth across broad metal areas. 

• Low-Vibration Concentric Operation: Precision-ground Swiss tool steel core minimizes radial runout, eliminating chatter marks under high bench magnification. 

• Hardened Swiss-Quality Tool Steel: Provides long-lasting wear resistance and consistent cutting efficiency across daily workshop production. 

• Universal 2.35 mm (3/32") Shank: Provides seamless compatibility across all standard flexible shaft systems, quick-change handpieces, and laboratory micromotors.

Size Selection Guide