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The High Speed Steel Burs, Size 10 (2.7 mm) Heart 45° is engineered for jewelers who require uncompromising precision and long-lasting performance in stone setting and fine metal shaping. Manufactured from premium High Speed Steel (HSS), this professional-grade bur delivers exceptional hardness, superior edge retention, and consistent cutting efficiency—even under continuous high-speed use. The 45° heart-shaped cutting profile is specifically designed for stone-setting applications, offering precise control when creating stone seats, undercuts, reliefs, and shaped contours. With a 2.7 mm (Size 10) diameter, it strikes the perfect balance between efficient metal removal and accuracy for detailed work. This makes it ideal for prong settings, bezel shaping, flush mount preparation, and precision carving in both soft and hard metals. A spiral-fluted cutting pattern enhances smoothness, reduces material buildup, and prevents overheating—ensuring a clean, consistent cut every time. The bur is built with the industry-standard 3/32″ (2.35 mm) shank, ensuring full compatibility with all major flex shafts, micromotors, and rotary tools commonly used in professional jewelry workshops. Created for expert jewelers, stone setters, engravers, and bench professionals, this heart bur supports flawless detailing, cleaner seats, and secure stone placement while improving workflow efficiency. Key BenefitsHigh Durability: Precision-crafted from High Speed Steel for superior hardness, long tool life, and excellent heat resistance. Accurate 45° Heart Profile: Provides precise shaping and controlled undercutting for professional stone-setting work. Clean & Smooth Cutting Action: Spiral flutes minimize clogging and ensure consistent chip removal and cooler operation. Ideal 2.7 mm Size: Offers the perfect blend of fine detailing and efficient metal shaping. Standard 3/32″ Shank: Fully compatible with all professional jewelry rotary systems. Professional-Grade Performance: Produces cleaner settings, smoother surfaces, and reduced finishing time.
- Material: High Speed Steel (HSS)
- Cut Profile: Heart Shape, 45°
- Size / Diameter: Size 10 (2.7 mm)
- Shank Size: 3/32″ (2.35 mm)
- Flute Type: Spiral-Cut
- Primary Use: Stone setting, undercutting, shaping, precision carving
- Compatible Tools: Flex shaft, micromotor, rotary jewelry tools
Safety Notes: - Use appropriate speed settings based on the material being cut.
- Always wear safety glasses, gloves, and protective equipment.
- Ensure the bur is securely mounted before operation.
- Avoid excessive pressure; let the tool do the work to prevent breakage.
- Keep the work area clean and well-lit, away from flammable materials.
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Features
High Speed Steel construction for maximum durability and long-lasting sharp cutting edges.
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45° heart-shaped profile ideal for stone seats, undercuts, and precision shaping.
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Spiral-cut flutes for cleaner cutting, reduced debris, and cooler operation.
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Size 10 (2.7 mm) diameter for balanced performance in fine and medium detailing.
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3/32″ (2.35 mm) standard shank compatible with flex shafts, micromotors, and rotary jewelry tools.
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Suitable for professional jewelers specializing in stone setting, engraving, and intricate metalwork.
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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