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The Busch® Burs - Twist Drills, Fig. 77 - 2.30mm (ISO #023) offer unmatched precision and durability, making them an essential tool for professional jewelers and artisans. Our Busch® Fig. 77 Twist Drills measure 2.30mm (0.0906”) and are made of tungsten vanadium steel for exceptional strength and a long-lasting edge.
The precision-machined, uniformly spaced flutes ensure accurate and smooth cutting, while the 3/32" shanks, measuring approximately 1.75" long, are compatible with most rotary tools such as flex shafts and Dremels.
For optimal performance, use a cutting lubricant, such as Lube-Stik, to facilitate smooth drilling and extend tool life. The recommended speed range is 1,400 – 10,000 rpm; consult ANSI guidelines for precise speed recommendations.
These burs, made in Germany, are crafted to deliver flawless finishes, whether used for detailed jewelry work or repairs.
Designed for accuracy and efficiency, Busch® Twist Drills Fig. 77 elevate your craftsmanship by reducing material damage and ensuring consistent results.
Brand: Busch®
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Diameter: 2.30mm (0.0906”)
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Figure Number: 77
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Material: Tungsten Vanadium Steel
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Package Contents: 6 twist drills
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Shank Size: 3/32” diameter, approx. 1.75” length
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Shape: Twist Drill
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ISO Classification: #023
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Material Quality: High-grade steel for precision and durability
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Quantity: 6 drills per pack
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Country of Origin: Germany
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Applications: Ideal for drilling metals, gemstones, plastics, and other hard materials. Perfect for jewelers, metalsmiths, and fine detail work.
About this Item
Busch® burs are expertly crafted from premium tungsten vanadium steel, engineered to maintain smooth, even cuts and deliver a flawless finish. Their fine teeth and precise cutting edges are ideal for detailed jewelry work, ensuring reliable performance even at low speeds.
How to Use
Safety Information
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Always wear protective eyewear when operating rotary tools
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After use, clean with a soft cloth and mild soap to maintain sharpness and tool integrity
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Features
Tungsten Vanadium Steel: Provides exceptional strength, edge retention, and resistance to wear for long-lasting use.
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Precision-Machined Flutes: Uniformly spaced flutes ensure clean, accurate cutting with minimal material displacement.
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Ideal Size & Shape: 2.30mm diameter Fig. 77 twist drill is perfect for creating precise holes in a variety of materials.
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3/32” Shank Compatibility: Standard 3/32” (approx. 1.75” long) shank fits most rotary tools including Dremels and flex shafts.
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Wide Speed Range: Optimized for rotary speeds between 1,400 - 10,000 rpm for control and versatility.
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Corrosion-Resistant Finish: Steel composition resists rust and degradation during regular use and storage.
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German Engineering: Made in Germany to meet the highest standards of manufacturing and quality control.
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Smooth Entry & Exit: Reduces the risk of chipping or cracking delicate materials such as gemstones or glass.
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Lubrication Recommended: Performs best with lubricants like Busch® Lube-Stik to extend tool life and improve cutting performance.
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Professional-Grade Performance: Trusted by jewelers, watchmakers, and precision artisans for accurate and consistent results.
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Bulk Convenience: Pack of 6 drills ensures you always have spares on hand for workshop productivity.
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