 |
 |
 |
|
The Busch® Burs – Twist Drills, Fig. 77 - 1.20mm (ISO #012) offer unmatched precision and durability, making them an essential tool for professional jewelers, watchmakers, and artisans. Expertly crafted in Germany, these high-performance twist drills are engineered to deliver clean, accurate results in delicate or detailed work.
Each Busch® Fig. 77 Twist Drill measures 1.20mm (0.0472”) in diameter and is made from premium tungsten vanadium steel, providing exceptional strength, resistance to wear, and a long-lasting cutting edge. The precision-machined, uniformly spaced flutes ensure smooth, chatter-free drilling and help maintain control even on intricate materials.
With 3/32" shanks (2.35mm) and an overall length of approximately 1.75", these drills are fully compatible with most rotary tools, including flex shafts, micromotors, and Dremels, making them versatile for various bench setups.
Brand: Busch®
-
Figure Number: 77
-
Diameter: 1.20mm (0.0472”)
-
ISO Classification: #012
-
Material: Premium Tungsten Vanadium Steel
-
Shank Size: 3/32” (2.35mm) diameter, approx. 1.75” (44.5mm) length
-
Shape: Twist Drill
-
Package Contents: 6 twist drills
-
Quantity: 6 drills per pack
-
Material Quality: High-grade, wear-resistant steel for precision and durability
-
Country of Origin: Germany
-
Compatibility: Fits most rotary tools including Dremel®, Foredom®, micromotors, and flex shafts
-
Applications: Ideal for drilling metals, gemstones, ceramics, plastics, and other hard materials
About this Item:
Busch® Twist Drills Fig. 77 are meticulously manufactured in Germany to meet the highest standards in tool performance. Constructed from tungsten vanadium steel, these drills offer exceptional strength, long-lasting sharpness, and resistance to wear. The uniform, precision-machined flutes ensure smooth, accurate cutting with minimal vibration, making them a top choice for jewelers, model makers, and precision craftsmen.
How to Use:
-
Attach the drill to a compatible rotary tool such as a flex shaft, micromotor, or Dremel®.
-
Apply light pressure during drilling to avoid breakage or overheating.
-
Use a lubricant like Busch Lube-Stik to reduce friction, promote smoother drilling, and extend tool life.
-
For best results, maintain tool speeds between 1,400 – 10,000 rpm, adjusting based on the material being drilled.
Safety Information:
-
Always wear protective eyewear and a dust mask when drilling.
-
Keep hands, hair, and loose clothing away from rotating tools.
-
After use, clean burs with a soft brush and mild soap or ultrasonic cleaner to maintain sharpness.
-
Store burs in a dry, protective case to prevent corrosion and damage.
Why Choose Busch®?
Busch® is globally recognized for its commitment to precision, innovation, and quality craftsmanship. Trusted by professionals for over a century, Busch tools are engineered to deliver exceptional results in the most demanding applications. Whether you're a master jeweler or a meticulous hobbyist, Busch® burs and drills provide the accuracy and reliability you need.
|
|
|
 |
|
 |
|
|
|
 |
|
 |
|
Features
Tungsten Vanadium Steel
Engineered for exceptional strength, durability, and long-lasting edge retention.
-
Precision-Machined Uniform Flutes
Deliver smooth, accurate, and chatter-free drilling for detailed work.
-
Exact Size & Shape
1.20mm diameter (ISO #012), Fig. 77 twist drill – ideal for fine jewelry and intricate applications.
-
Standard Shank Size
3/32" (2.35mm) shank, approx. 1.75" long – fits most rotary tools including Dremel®, Foredom®, and flex shafts.
-
Wide Speed Range
Optimized for use between 1,400 – 10,000 rpm. Refer to ANSI guidelines for specific materials.
-
Made in Germany
Manufactured to the highest standards for precision, quality, and reliability.
-
Professional-Grade Pack
Includes a set of 6 twist drills, perfect for jewelers, artisans, watchmakers, and hobbyists alike.
|
|
|
|
|
|
|