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Busch Burr 77A Pearl Drill 2.30mm
– a top choice for professional jewelers, delivers precision and quality to
prevent chipping and create smooth holes in delicate materials like pearls. Established in 1905, Busch is a
world leader in high-precision rotary tools, renowned for their durable, high-quality burs
tailored for precision and reliability in jewelry making.
These Busch® Burs Pearl Drills
feature a unique smooth flat head and a 2.30mm
diameter crafted from strong hardened steel, ensuring clean,
soft-edged holes without damaging the nacre. Each bur has a 4.2mm working head depth,
designed for consistent results whether drilling or enlarging pre-existing
holes. Use them with various compatible drills, such as pendant drills,
micromotors, or a pin vice, to maintain control and precision.
For optimal results, pearls should be held in a pearl vice or in fingers
wrapped with protective tape and drilled under water to prevent overheating and
discoloration. Busch® Burs are crafted for long-lasting
performance and are essential for any jeweler’s toolkit,
offering smooth finishes and fine detailing with ease.
- Brand: Busch®
- Type: Pearl Drill Bur
- Model: 77A Pearl Drill
- ISO Number: #023
- Shank diameter: 3/32"
- Size: 2.30mm diameter, 4.2mm working head depth
- Shank: 2.34mm tapered, compatible with various
drill collets
- Material: High-quality hardened steel
- Application: Jewelry making, pearl drilling,
delicate material drilling
About this Item: Busch® burs are crafted from premium tungsten vanadium steel, designed to
maintain smooth, even cuts and deliver a flawless finish. Their fine teeth and
precise cut make them ideal for jewelry detailing and repair, providing
reliable performance at low speeds.
How to Use:
Attach the bur to a rotary tool like a flex shaft or Dremel. Apply gentle
pressure and consider using a lubricant, such as Busch Lube-Stik, to extend the
bur’s lifespan.
Safety Information:
Always wear protective eyewear when using Busch® burs. Clean with a soft
cloth and mild soap after each use to preserve sharpness and quality.
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