 |
 |
 |
|
Upgrade your cutting and grinding projects with our Size 31 (8.9) Bearing 90° High-Speed Burs, expertly crafted from premium tungsten carbide for maximum durability and precision. Engineered to withstand high rotational speeds and demanding tasks, these burs deliver consistent, accurate results on a wide range of materials, including metals, plastics, wood, and ceramics. Perfect for professional craftsmen, industrial use, and DIY enthusiasts, these burs combine efficiency, control, and versatility in one reliable tool. Key Features & Benefits
-
Superior Durability: Made from high-quality tungsten carbide to resist wear, chipping, and heat for long-lasting performance.
-
Precision Cutting: Sharp, finely engineered edges provide accurate and detailed cuts every time.
-
Efficient Grinding: Quickly and smoothly removes material, shaping surfaces with minimal effort.
-
90° Bearing Design: Ensures smooth, balanced rotation and precise control for a flawless finish.
-
Versatile Applications: Ideal for metalworking, jewelry making, woodworking, plastics, ceramics, and other industrial or DIY projects.
Perfect For
-
Jewelers and metalworkers
-
Industrial precision work
-
DIY craft projects
-
Woodworking and carving
-
Detailed shaping, polishing, and finishing
- Size - 31 (8.9)
- Bearing - 90°
- Shank Diameter - 3/32″ (approximately 2.35 mm)
- Cut Length (In/Pul) - 0.35″
- Recommended Maximum Speed - Up to ~200,000 RPM for sizes above ISO 012 (≈3 mm)
- Compatibility - Fits standard high‑speed rotary tools / handpieces
- Typical Applications - Precision cutting, grinding, shaping, polishing of metals, plastics, wood, ceramics
- Professional Use - Industrial & DIY work requiring high precision
Safety Note: Please be careful when using high speed burs, as they can rotate at very high speeds. Always wear safety glasses and gloves when using high speed burs.
|
|
|
 |
|
 |
|
|
|
 |
|
 |
|
Features
Durable Tungsten Carbide Construction: Made from high‑quality tungsten carbide, this bur resists heat, wear, and deformation—even under intense rotational speeds.
-
Ultra‑Sharp Cutting Edges: The precisely machined edges ensure fast, clean cuts and efficient grinding across metals, plastics, wood, and ceramic materials.
-
90° Bearing Design: A 90° bearing configuration provides smooth, balanced rotation for controlled, accurate finishes with minimal vibration.
-
Versatile Use for Industrial & DIY Applications: Perfect for metalworking, woodworking, model‑making, jewelry, hobby crafts, and detailed shaping or finishing tasks.
-
High‑Speed Efficiency: Engineered for compatibility with high‑speed rotary tools, enabling faster material removal without compromising precision.
-
Reduced Vibration & Improved Control: Advanced design and material selection help minimize “chatter” during use, leading to smoother results and less operator fatigue.
-
Extended Tool Life: Resistance to dulling, chipping, and excessive wear means fewer replacements, lower downtime, and better value over time.
-
Access to Tight or Intricate Areas: The Size 31 (8.9) dimension allows access into narrow, detailed zones—ideal for fine work or intricate surface shaping.
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 |
|
|
|
|
|
|
|
|
|
|
|