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Crafted from high-grade tungsten vanadium steel, the Busch® 90° Hart Bur ISO #050 Fig. 156C, 5.00 mm offers outstanding strength, durability, and precision. Each bur is expertly engineered to provide smooth, consistent, and precise cuts, making it the preferred choice for professional jewelers seeking reliable, high-quality results. Proudly manufactured in Germany, these burs are well-known for their exceptional sharpness and longevity—vital for detailed and delicate jewelry work. The bur features a precise 90° Hart angle, designed to assist jewelers in performing intricate tasks such as prong shaping, edge refinement, and delicate finishing on a variety of metals. The standard 3/32" (2.38 mm) shank diameter ensures compatibility with most rotary tools, while the 1-3/4" (44.5 mm) length allows for comfortable handling and precise control. The 5.00 mm head diameter offers an excellent balance of durability and finesse for high-precision shaping.
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: #050
Size: 5.00 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. Equipped with uniformly spaced, precision-machined teeth, these burs ensure smooth, accurate cuts perfect for detailed shaping, carving, and setting tasks. The maximum safe speed varies by bur size and is clearly indicated on the packaging. For best results and extended tool life, use with a high-quality lubricant.
How to Use
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Attach the bur securely to your rotary tool, flex shaft, or Dremel.
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Apply light pressure during use to avoid overheating and prolong the bur's lifespan.
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Use a lubricant such as Busch Lube-Stik to reduce friction and maintain cutting efficiency.
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Operate within the recommended speed range specified on the box.
Safety Information
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Always wear protective eyewear while operating rotary tools.
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After each use, clean burs with a soft cloth to remove debris and maintain sharpness.
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Store burs properly in a dry environment to prevent damage.
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Features
Premium Material: Made from durable tungsten vanadium steel, offering excellent wear resistance and long-lasting cutting performance.
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Precision-Cut Teeth: Uniformly spaced, precision-machined teeth deliver smooth, accurate, and efficient cutting for fine detailing.
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90° Hart Angle: Engineered for superior control during intricate jewelry-making tasks such as prong shaping, seat cutting, and edge refinement.
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Head Diameter: 5.00 mm size is ideal for detailed work in small to medium settings, balancing strength with precision.
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Compatible Shank: Standard 3/32" (2.38 mm) shank fits most rotary tools including flex shafts, micromotors, and Dremel tools.
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Optimal Length: Approximately 1-3/4" (44.5 mm) total length ensures comfortable handling and maneuverability in tight spaces.
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Cross-Cut Design: Promotes even cutting action, reduces heat buildup, and provides a smooth finish on a wide variety of metals and materials.
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Versatile Use: Suitable for gem setting, shaping, carving, polishing, engraving, and delicate metalwork.
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German Engineering: Crafted in Germany under strict quality controls, ensuring consistency, sharpness, and reliability.
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Pack Quantity: Includes 6 burs per package, offering a reliable supply for professional jewelers and metalworkers.
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Heat & Wear Resistance: Tungsten vanadium steel composition helps resist heat and wear, extending the life of the burs.
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Low Vibration Operation: Balanced design minimizes vibration for greater precision and user comfort during extended use.
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Easy Maintenance: Designed for straightforward cleaning and re-sharpening to maintain peak cutting efficiency.
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Safe Operating Speeds: Maximum recommended RPMs are clearly marked on packaging to optimize performance and safety.
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Wide Application Range: Ideal for precious metals like gold, silver, and platinum, as well as other common metals in jewelry fabrication.
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