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Elevate your jewelry-making precision with our premium high-speed steel bur in Size 11 (2.9) mm, featuring a 90° bearing. Crafted from top-quality American steel and engineered for exceptional durability, this tool is designed to outperform traditional jewelry burs. The spiral-cut design optimizes cutting action, minimizes loading, and delivers smoother, more efficient material removal. With a 3/32″ shank diameter (fits most standard handpieces), it’s ready for professional use or dedicated DIY work—whether you’re engraving, polishing, shaping, or performing detailed metalwork. Key Features
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Superior Material: High-quality American steel for optimal performance and extended life.
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Versatile Applications: Perfect for deburring, polishing, engraving, and fine detailing in jewelry-making and metalwork.
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Long-Lasting: Outlasts standard burs with up to 10× the durability when used correctly.
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Efficient Cutting: Spiral-cut geometry delivers precise and efficient results with less effort.
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Wide Compatibility: Fits most standard handpieces thanks to the universal 3/32″ shank.
- Size (Head Diameter): 11 (≈ 2.9 mm)
- Bearing Angle: 90°
- Shank Diameter: 3/32″ (~2.35 mm)
- Cut/Length (In/Pull): 0.114″
- Shape: Bud‑type (rounded top) — ideal for deburring, polishing, engraving
- Flute/Cut Design: Spiral‑cut geometry to enhance cutting efficiency and reduce loading
- Compatibility: Fits standard 3/32″ collet handpieces, micromotors, and flexible‐shaft rotary tools
- Typical Applications: Deburring, polishing, engraving, shaping and finishing in jewelry making, metalworking, plastics, wood, and ceramics
- Safety Note: Please take care when using high‑speed burs, as they rotate at very high speeds. Always wear safety glasses and gloves when using high‑speed burs.
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Features
- Premium High‑Speed Steel Construction: Made from superior-grade steel (such as M2 or equivalent) with exceptional hardness, delivering long‑lasting performance for demanding tasks.
- Bud‑Shape Head Design: The bud‑type profile allows access to curved surfaces, recesses and undercuts—ideal for deburring, polishing, engraving and shaping in jewelry and metalwork.
- Spiral Cut or High‑Quality Flute Geometry: Optimized flute design improves chip evacuation, reduces loading and enhances cutting efficiency across materials.
- Versatile Compatibility: Standard 3/32″ (≈ 2.35 mm) shank ensures compatibility with most rotary tools, micromotors and handpieces—making integration into existing setups seamless.
- Smooth Operation & Precision Control: Balanced design and high‑concentricity tolerance help minimize vibration and chatter, supporting finer finishes and better user control.
- Wide Material Application Range: Ideal for metalworking (gold, silver, brass), jewelry making, engraving work, polishing tasks, wood and plastics—one tool for multi‑material use.
- Optimized for Detail with Size 11 (2.9 mm): Provides a larger head diameter than smaller burs while still offering fine manipulation—excellent choice for both shaping and finishing.
- Durability Under Speed and Load: Engineered to maintain cutting edges under high‑RPM operation, offering better longevity and value than standard burs.
High Speed Bur Size Convertion Chart |
| SIZE |
MM |
IN/PUL. |
|
SIZE |
MM |
IN/PUL. |
| 1 |
1.05 |
0.035 |
|
18 |
4.5 |
0.177 |
| 2 |
1.2 |
0.043 |
|
19 |
4.7 |
0.185 |
| 3 |
1.35 |
0.051 |
|
20 |
5 |
0.197 |
| 4 |
1.5 |
0.059 |
|
22 |
5.2 |
0.204 |
| 5 |
1.7 |
0.067 |
|
23 |
5.4 |
0.212 |
| 6 |
1.9 |
0.075 |
|
24 |
5.6 |
0.22 |
| 7 |
2.1 |
0.083 |
|
25 |
5.9 |
0.232 |
| 8 |
2.3 |
0.09 |
|
26 |
6.3 |
0.248 |
| 9 |
2.5 |
0.098 |
|
27 |
6.7 |
0.263 |
| 10 |
2.7 |
0.106 |
|
28 |
7.2 |
0.283 |
| 11 |
2.9 |
0.114 |
|
29 |
7.6 |
0.299 |
| 12 |
3.1 |
0.122 |
|
30 |
8 |
0.314 |
| 13 |
3.3 |
0.13 |
|
31 |
8.9 |
0.35 |
| 14 |
3.5 |
0.138 |
|
32 |
9.6 |
0.377 |
| 15 |
3.8 |
0.149 |
|
33 |
10.4 |
0.409 |
| 16 |
4 |
0.157 |
|
34 |
11 |
0.437 |
| 17 |
4.3 |
0.169 |
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