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Busch® Burs Pearl Drills 1.40mm (ISO #014) are the preferred choice of professional jewelers and artisans worldwide. Established in 1905, Busch has a long-standing reputation for producing high-precision rotary tools crafted from premium materials, offering unparalleled durability and reliability tailored specifically for delicate applications like pearl drilling and jewelry making.
These pearl drills feature a unique smooth flat head design with a 1.40mm diameter, made from high-quality hardened tungsten vanadium steel, ensuring clean, soft-edged holes without causing damage to the fragile nacre surface. Each bur provides a 4.2mm working head depth to deliver consistent and precise drilling, whether creating new holes or enlarging existing ones.
The 2.34mm tapered shank is compatible with a wide range of rotary tools, including pendant drills, micromotors, flex shafts, Dremel tools, and pin vices, enabling optimal control and precision during delicate operations.
For best results, pearls should be securely held in a pearl vice or cushioned with protective tape, and drilling should be performed under water or with adequate lubrication to prevent overheating, cracking, or discoloration of the pearl. The smooth cutting action of Busch® burs helps minimize vibration and ensures a flawless finish, making these burs essential for any jeweler’s toolkit.
Key Benefits:
- Precision drilling with minimal chipping or cracking
- Smooth flat head for clean, soft-edged holes
- Durable tungsten vanadium steel construction for long-lasting sharpness
- 4.2mm working depth for controlled and repeatable results
- Compatible with multiple rotary tool systems
- Ideal for pearls, coral, beads, and other delicate materials
- Pack of 6 burs for extended use or backup
- Made in Germany under strict quality standards
- Brand: Busch®
- Type: Pearl Drill Bur
- Model: 77A Pearl Drill
- ISO Number: #014
- Size: 1.40mm diameter, 4.2mm working head depth
- Shank: 2.34mm tapered, compatible with a variety of drill collets and rotary tools
- Material: Premium hardened tungsten vanadium steel
- Application: Jewelry making, pearl drilling, bead drilling, delicate material drilling
About this Item:
Busch® 77A Pearl Drill Burs are precision-engineered rotary tools crafted from high-quality hardened tungsten vanadium steel, renowned for its toughness and long-lasting sharpness. Designed to create clean, soft-edged holes in fragile materials like pearls, coral, beads, and other delicate gemstones, these burs deliver flawless finishes while minimizing the risk of chipping or cracking.
How to Use:
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Secure the bur in a rotary tool such as a flex shaft, pendant drill, micromotor, or Dremel with a compatible collet.
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Use gentle, steady pressure to allow the bur to cut smoothly without forcing or overheating the material.
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For delicate materials like pearls, it is recommended to drill under water or apply a lubricant such as Busch Lube-Stik to reduce friction and prolong the bur’s lifespan.
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Frequently clear debris and avoid overheating to maintain bur sharpness and material integrity.
Safety Information:
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Always wear protective eyewear during use to guard against flying debris.
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Clean burs after use with a soft cloth and mild soap to prevent buildup and corrosion.
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Store burs in a dry, safe place to maintain quality and sharpness over time.
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Use appropriate speed settings (typically between 1,400 and 10,000 RPM) based on the material being drilled.
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Avoid excessive pressure to prevent tool breakage and material damage.
Additional Features:
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Smooth flat head design minimizes stress on fragile pearls and beads.
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Excellent for jewelry repair, custom design, and precision beadwork.
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Compatible with various collets and chuck systems ensuring easy integration into existing tool setups.
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Manufactured with precision engineering to ensure even cutting and reduced vibration.
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Features
1.40mm Precision Drill Diameter
Engineered to prevent chipping and deliver clean, soft-edged holes in pearls, coral, beads, and other fragile materials.
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High-Quality Hardened Tungsten Vanadium Steel
Manufactured from premium hardened steel alloy for superior durability and long-lasting sharpness even with frequent use.
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4.2mm Working Head Depth
Provides a controlled drilling depth, allowing precise hole creation or enlargement without risking damage to delicate surfaces.
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Smooth Flat Head Design
Minimizes stress and vibration during drilling, ensuring minimal damage to soft organic materials like nacre and coral.
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Versatile Compatibility
Designed to fit standard 2.34mm tapered shanks compatible with pendant drills, micromotors, flex shafts, Dremels, and pin vices.
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Low-Speed Performance
Optimized for efficient use at low to moderate speeds (1,400–10,000 RPM), reducing heat buildup and extending tool life.
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Pack of 6 Burs
Ideal for jewelers requiring multiple burs for continuous work, replacements, or bulk usage in workshops.
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Made in Germany
Produced under strict quality control standards to ensure consistent precision and reliability in professional jewelry applications.
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Lubrication Friendly
Compatible with lubricants such as Busch Lube-Stik or water cooling to enhance cutting performance and prolong tool lifespan.
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Professional Grade Quality
Trusted worldwide by jewelers and artisans for accuracy, smooth finishes, and reliable performance in intricate jewelry making and repair.
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Safe and Easy to Maintain
Easy to clean after use with mild soap and soft cloth, maintaining sharpness and preventing corrosion.
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