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Crafted from premium tungsten vanadium steel, the Busch® 90° Hart Bur ISO #047 Fig. 156C, 4.70 mm, offers exceptional strength, durability, and precision. Each bur is meticulously engineered to provide smooth, consistent, and even cuts, making it a trusted choice for professional jewelers who demand flawless results. Proudly manufactured in Germany, these burs are renowned for their sharpness and reliability—key factors for intricate jewelry-making tasks. Featuring a precise 90° Hart angle, this bur excels at detailed work such as prong shaping, edge refinement, and delicate finishing on various metals. The 3/32" (2.38 mm) shank diameter ensures compatibility with most standard rotary tools, while the 1-3/4" (44.5 mm) length offers comfortable handling for fine control. The 4.70 mm head diameter strikes the perfect balance between strength and finesse, enabling high-precision shaping and carving.
For optimal performance, apply light pressure and use
with a high-quality lubricant to reduce friction and prolong sharpness. Safe
operating speeds are noted on the box, ensuring long-lasting, high-quality
results. Always clean the burs with a soft cloth after use to maintain their
sharpness, and wear protective eyewear to ensure safety during operation.
Brand: Busch®
Type: 90° Hart Bur
ISO Number: #047
Size: 4.70 mm
Figure: 156C
Cut Type: Cross-cut
Shape: Cylinder Square
Shank Diameter: 3/32" (2.38 mm)
Length: Approximately 1-3/4" (44.5 mm)
Quantity: Pack of 6
Material: Tungsten vanadium steel for long-lasting sharpness and durability
Additional Information
Busch® Burs are highly regarded in the jewelry industry for their exceptional quality and precision. Featuring uniformly spaced, precision-machined teeth, these burs deliver smooth, accurate cuts essential for detailed shaping, carving, and prong setting. Each bur is engineered to meet demanding professional standards. The maximum safe operating speed varies by bur size and is clearly indicated on the packaging. For optimal tool life and cutting performance, it is recommended to use these burs with a lubricant.
How to Use
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Securely attach the bur to a rotary tool, flex shaft, or Dremel handpiece.
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Apply light, consistent pressure during use to avoid overheating and prolong bur life.
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Use a high-quality lubricant, such as Busch Lube-Stik, to reduce friction and maintain sharpness.
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Operate within the recommended speed range indicated on the packaging.
Safety Information
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Always wear appropriate eye protection when operating rotary tools.
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After each use, clean the burs with a soft cloth to remove debris and preserve sharpness.
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Store burs in a dry, safe place to maintain performance and prevent damage.
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Features
Premium Material: Made from durable tungsten vanadium steel for exceptional strength, corrosion resistance, and long-lasting cutting performance.
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Precision-Cut Teeth: Uniformly spaced, precision-machined cross-cut teeth provide smooth, accurate, and efficient material removal with minimal vibration.
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90° Hart Angle: Expertly designed to offer optimal control and precision for intricate tasks such as prong shaping, stone seat preparation, and fine edge refinement.
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Head Diameter: 4.70 mm size is perfect for detailed work in small to medium jewelry settings, balancing strength with finesse.
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Compatible Shank: Standard 3/32" (2.38 mm) shank fits most rotary tools, including flex shafts, Dremels, and micromotor handpieces for versatile use.
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Optimal Length: Approximately 1-3/4" (44.5 mm) total length provides comfortable handling and excellent maneuverability in tight spaces.
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Cross-Cut Design: Ensures even cutting action, reduces heat buildup, and delivers smooth finishing on a wide variety of metals and materials.
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Versatile Use: Ideal for gem setting, prong shaping, carving, polishing, engraving, and delicate metal shaping applications.
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German Engineering: Manufactured in Germany with rigorous quality control standards for consistent sharpness and durability.
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Pack Quantity: Includes 6 burs per package, offering a reliable, cost-effective supply for professional jewelers and metalworkers.
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Heat and Wear Resistant: Tungsten vanadium steel composition enhances resistance to wear and overheating, prolonging tool life.
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Low Vibration Operation: Balanced design minimizes vibration during use, ensuring comfort and precision in extended work sessions.
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Easy Maintenance: Designed for easy cleaning and re-sharpening to maintain peak performance over time.
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Safe Operating Speeds: Maximum recommended RPM clearly marked on packaging to optimize performance and safety.
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Wide Application Range: Suitable for use on precious metals such as gold, silver, platinum, and other common metals in jewelry fabrication.
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