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Busch® 90° Hart Burs, ISO #0145 Fig. 156C (1.45 mm), are expertly manufactured in Germany from premium tungsten vanadium steel, delivering outstanding durability and long-lasting sharpness. Known for their precision engineering, these burs are ideal for jewelers requiring consistent, clean cuts for detailed metalwork and stone setting. Featuring a 90° Hart angle and a finely tuned cross-cut design, these burs are perfect for intricate jewelry tasks such as prong shaping, edge detailing, and fine surface finishing across a range of precious metals. The 1.45 mm head diameter offers excellent control and accuracy for small-scale applications.
With a 3/32" (2.38 mm) shank and total length of approximately 1-3/4" (44.5 mm), these burs fit most standard rotary tools, flex shafts, and micromotors.
Brand: Busch®
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Product Type: 90° Hart Bur
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ISO Number: #0145
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Bur Size: 1.45 mm
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Figure: 156C
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Cut Type: Cross-cut
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Shape: Cylinder Square
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Head Angle: 90° Hart
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Shank Diameter: 3/32" (2.38 mm) – fits most rotary tools, flex shafts, and micromotors
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Overall Length: Approx. 1-3/4" (44.5 mm)
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Material: Tungsten vanadium steel – precision ground for durability and longevity
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Quantity: Pack of 6 burs
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Made In: Germany
Additional Information
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High-Precision Manufacturing: Busch® Burs are recognized worldwide for their reliable performance and fine craftsmanship. Manufactured in Germany, each bur features evenly spaced, machined teeth for ultra-smooth cutting.
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Consistent Results: Ideal for detailed carving, gemstone setting, prong work, and refining metal edges in gold, platinum, silver, and other metals.
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Cross-Cut Geometry: The cross-cut design enhances material removal while producing clean, polished finishes with minimal effort.
How to Use
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Mounting: Secure the bur properly into your rotary tool, Dremel, or flex shaft.
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Lubrication: Use a high-quality lubricant such as Busch Lube-Stik to minimize heat and wear.
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Pressure: Apply light, even pressure to maintain control and avoid tool damage.
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Speed: Refer to the safe RPM guide on the packaging—do not exceed recommended speeds.
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Cleaning: Wipe clean with a soft cloth after each use to remove debris and extend lifespan.
Safety Instructions
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Always wear eye protection and secure loose clothing or hair while operating rotary tools.
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Avoid excessive pressure to prevent tool wear or damage.
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Ensure proper ventilation if using burs with dust-generating materials.
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Features
Premium Tungsten Vanadium Steel
Engineered from high-quality tungsten vanadium steel for superior hardness, strength, and extended tool life.
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Precision-Cut Cross Teeth
Uniformly spaced, precision-machined cross-cut teeth deliver exceptionally smooth, controlled cutting with minimal chatter.
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90° Hart Angle Design
Ideal for prong shaping, stone setting, fine detailing, and precise finishing in intricate jewelry work.
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Compact Cutting Head – 1.45 mm Diameter
Perfect for detailed applications in tight or small settings without compromising control or performance.
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Standard 3/32" (2.38 mm) Shank
Compatible with most popular rotary tools, flex shafts, and micromotors used in jewelry workshops and studios.
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Optimized Length – 1-3/4" (44.5 mm)
Provides a balanced grip and maneuverability for delicate operations in jewelry fabrication.
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Versatile Cross-Cut Geometry
Offers clean, efficient removal of metal with smooth edges, suitable for gold, silver, platinum, and other metals.
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Consistent Performance
Maintains cutting sharpness over time, even with frequent use, when properly maintained.
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Made in Germany
Manufactured under strict quality standards for unmatched precision and reliability in the jewelry industry.
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Economical Pack Size
Includes 6 high-performance burs, ideal for regular use or stocking professional benches.
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