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High Speed Steel Ball Burs Size 18 (4.5mm) Round
High Speed Steel Ball Burs Size 18 (4.5mm) Round
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Spanish Name: FRESAS DE ALTA VELOCIDAD,TAMAÑO 18. Redondo


Product Code: B260-18
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Description Technical Specs
 

The High Speed Steel Ball Burs Size 18 (4.5mm) Round is a high-performance cutting tool engineered for professional jewelers who require exceptional precision, power, and durability for large-scale shaping tasks. Manufactured from premium high-speed steel (HSS), this bur delivers superior hardness and long-lasting sharpness, ensuring clean, controlled cutting across a broad range of jewelry metals.

With a 4.5mm round head, this bur is ideal for deeper cavity cutting, larger stone-seat preparation, bulk material removal, and advanced metal shaping. Its larger diameter allows for smooth, rounded carving while maintaining absolute stability during high-speed rotation. This makes it essential for tasks such as creating wide recesses, refining bezel interiors, smoothing curved surfaces, and performing heavy-duty shaping work in fine jewelry production.

Equipped with spiral-cut, precision-engineered flutes, this HSS bur ensures efficient chip clearance, reduced heat buildup, and smoother cutting action—critical for maintaining metal integrity and preventing tool overheating. The standard 3/32" (2.35mm) shank guarantees compatibility with professional flex shafts, micromotors, and rotary handpieces used in jewelry workshops.

Designed to work effectively on gold, silver, platinum, brass, and other jewelry alloys, it maintains consistent performance even during extended use. Its strong cutting ability reduces tool changeovers, enhances workflow efficiency, and supports high-level craftsmanship.

The High Speed Steel Ball Burs Size 18 (4.5mm) Round provides exceptional control, long tool life, and precise cutting capability—making it an indispensable tool for jewelers needing powerful yet accurate rotary burs for advanced metalwork.

Key Benefits

  • Large 4.5mm round head for deep cavity cutting and powerful material shaping

  • Hardened high-speed steel for extended sharpness and durability

  • Smooth, controlled cutting action with minimal heat generation

  • Perfect for bezel shaping, stone-seat work, and advanced detailing

  • Reliable performance for professional jewelry manufacturers
Features

  • 4.5mm precision round head designed for deeper cuts, larger recesses, and heavy-duty shaping.

  • High-speed steel construction ensures long-lasting sharpness and high wear resistance.

  • Spiral-cut flutes provide efficient metal removal and smooth cutting flow.

  • Standard 3/32" shank compatible with all professional jewelry rotary tools.

  • Ideal for bezel preparation, cavity forming, and large-volume metal shaping.

  • Delivers stable, clean cutting performance across gold, silver, platinum, and similar alloys.

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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