Swiss Fig. 77B cup burs are designed for rounding, shaping, and smoothing metal edges and prongs with precision control. The cup-shaped cutting head allows you to refine contours and create clean, uniform finishes in precious metals with balanced, consistent performance.
Features
- Fig. 77B cup bur profile for rounding and smoothing prongs and edges
- Manufactured from tungsten vanadium steel for strength and durability
- Precision-made to tight tolerances for consistent cutting performance
- Large diameter sizes ideal for heavier stock and bold settings
- Preferred by many jewelers for everyday bench use
- Sold individually
Specifications
| Bur Type |
Fig. 77B Cup |
| Material |
Tungsten Vanadium Steel |
| Size Range |
4.00 mm (0.157 in.) – 10.00 mm (0.394 in.) |
| Manufactured In |
Switzerland |
| Brand |
Otto Frei Swiss Burs |
Available Options
| Part # |
Bur Size |
| 118.386 |
8.50 mm (0.335 in.) |
| 118.387 |
9.00 mm (0.354 in.) |
| 118.388 |
9.50 mm (0.374 in.) |
| 118.389 |
10.00 mm (0.394 in.) |
| 118.391 |
4.00 mm (0.157 in.) |
| 118.392 |
4.50 mm (0.177 in.) |
| 118.393 |
5.00 mm (0.197 in.) |
| 118.394 |
5.50 mm (0.217 in.) |
| 118.395 |
6.00 mm (0.236 in.) |
| 118.396 |
6.50 mm (0.256 in.) |
| 118.397 |
7.00 mm (0.276 in.) |
| 118.398 |
7.50 mm (0.295 in.) |
| 118.399 |
8.00 mm (0.315 in.) |
California Prop 65 Warning: