Spearhead High Speed Steel (HSS) 90-degree bearing burs are hand cut by expert craftsmen in the USA, delivering the edge retention and long service life that quality jewelers demand. Each bur is size-stamped on its 3/32" shank for instant, at-a-glance identification—a hallmark of the Spearhead line. Compared to imported Tungsten Vanadium Carbon Steel burs, these HSS burs hold their edge longer thanks to the superior hardness of high speed steel, making them the preferred choice for professional stone setting work. Available in 33 sizes ranging from 0.90 mm to 11.10 mm, sold individually.
Features
- Hand cut by expert craftsmen in the USA
- High Speed Steel (HSS) construction for superior hardness and edge retention
- 90-degree bearing bur geometry for precise stone seat cutting
- Size stamped on shank for quick, reliable identification
- Longer service life compared to imported Tungsten Vanadium Carbon Steel burs
- Available in 33 sizes to accommodate a wide range of stone settings
Specifications
| Material |
High Speed Steel (HSS) |
| Bur Type |
90-Degree Bearing Bur |
| Shank Size |
3/32" |
| Size Range |
0.90 mm – 11.10 mm |
| Number of Sizes |
33 |
| Origin |
USA |
| Sold |
Individually |
Available Options
| Part # |
Bur Size |
Bur No. |
| 119.421 |
0.90 mm |
1 |
| 119.422 |
1.10 mm |
2 |
| 119.423 |
1.30 mm |
3 |
| 119.424 |
1.50 mm |
4 |
| 119.425 |
1.70 mm |
5 |
| 119.426 |
1.90 mm |
6 |
| 119.427 |
2.10 mm |
7 |
| 119.428 |
2.30 mm |
8 |
| 119.429 |
2.50 mm |
9 |
| 119.430 |
2.70 mm |
10 |
| 119.431 |
2.90 mm |
11 |
| 119.432 |
3.10 mm |
12 |
| 119.433 |
3.30 mm |
13 |
| 119.434 |
3.50 mm |
14 |
| 119.435 |
3.80 mm |
15 |
| 119.436 |
4.00 mm |
16 |
| 119.437 |
4.30 mm |
17 |
| 119.438 |
4.50 mm |
18 |
| 119.439 |
4.70 mm |
19 |
| 119.440 |
5.00 mm |
20 |
| 119.442 |
5.20 mm |
22 |
| 119.443 |
5.40 mm |
23 |
| 119.444 |
5.60 mm |
24 |
| 119.445 |
5.90 mm |
25 |
| 119.446 |
6.30 mm |
26 |
| 119.447 |
6.70 mm |
27 |
| 119.448 |
7.20 mm |
28 |
| 119.449 |
7.60 mm |
29 |
| 119.450 |
8.00 mm |
30 |
| 119.451 |
8.90 mm |
31 |
| 119.452 |
9.60 mm |
32 |
| 119.453 |
10.40 mm |
33 |
| 119.454 |
11.10 mm |
34 |
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