Busch® Carbide Krause Flame Bur

Mill fine setting borders, pierce delicate cast filigree, and shape acute transitions across refractory alloys without edge chatter, deflection, or premature tool wear. The Busch® 194AU Series Carbide Krause Flame Bur (Krause Flamme) is an industrial-grade rotary milling instrument engineered specifically for master goldsmiths, diamond setters, and fine jewelry model makers.

A classic bench favorite originally known in tool steel as Figure 194, this modern high-performance carbide edition belongs to the specialized HighTech-TOOL family. Distinguished by an unmistakable gold identification ring on the shank neck, Figure 194AU features an optimized cutting edge geometry designed specifically to master demanding materials. While conventional steel burs lose their cutting sharpness rapidly when machining abrasive or work-hardened metals, this solid carbide tool shears cleanly through platinum, white gold, titanium, jeweler's steel, and tantalum with exceptional penetration and chip evacuation. Its delicate, pointed flame head provides pinpoint access to acute gallery corners, prong root junctions, and tight micro-pavé layouts. Machined from finest-grain solid tungsten carbide (Feinstkornhartmetall), it guarantees high thermal resistance, torsional stiffness, and an extended bench service life. Mounted on an industry-standard 2.35 mm (3/32") shank, it drops directly into flexible shaft handpieces, precision bench micromotors, and quick-change bench systems. Available in fine diameters of 1.00 mm and 1.20 mm (194AU-010 and 194AU-012), each size is packaged in a protective case.

Why Choose Busch® Carbide Krause Flame Burs 194AU

• Finest-Grain Solid Carbide Core: Delivers superior abrasion resistance and thermal durability, significantly outlasting traditional tool steel Figure 194 burs on refractory metals.

• Optimized Cutting Edge Fluting: Engineered flutes enhance initial penetration and chip removal, preventing metal galling and tool grabbing in tough alloys.

• Pointed Flame Profile: Slender ogival geometry reaches into acute gallery angles, tight prong crevices, and miniature filigree scrolls without scraping adjacent walls.

• Engineered for Difficult Alloys: Cuts cleanly through white gold, platinum, titanium, jeweler's steel, and tantalum.

• Gold Ring HighTech-TOOL Identification: Features the signature gold ring band on the neck for immediate bench identification.

• Low-Vibration Concentric Operation: Precision-ground German shank minimizes radial runout, eliminating tool bounce and chatter marks under high microscope magnification.

• Universal 2.35 mm (3/32") Shank: Provides seamless compatibility across standard jewelry flexible shafts, bench micromotors, and quick-change handpieces.

Technical Specifications