Fig. 77B cup burs round, shape, and smooth metal edges and prongs with precision control, refining contours into a clean and uniform finish. These large diameter Swiss Fig. 77B cup burs from Otto Frei Swiss Burs are made from tungsten vanadium steel in Switzerland, and the cup-shaped cutting head works precious metals with balanced, consistent performance.
Features
- Fig. 77B cup bur profile for rounding and smoothing prongs and edges
- Tungsten vanadium steel construction for strength and durability
- Precision made to tight tolerances for consistent cutting performance
- Large diameter sizes suited to heavier stock and bold settings
- Preferred by many jewelers for everyday bench use
- Sold individually
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.) |