HSS Spiral Grooved Step Drills
The CBN ground and spiral flutes guarantee quiet running and high cutting performance. Especially the chip flow is optimized, so even long, non-breaking chips will be removed easily. The optimized chip flow protects the cutting edges and reduces built-up edges and cold weld marks. The cone makes it easier to withdraw the tool from the material.
| Size Range |
Step No. |
Shank Size |
| 4 – 12mm x 2mm |
5 |
6mm |
| 4 – 12 mm x 1mm |
9 |
6mm |
| 4 – 20mm x 2mm |
9 |
8mm |
| 4 – 22mm x 2mm |
10 |
8/10mm |
| 4 – 30mm x 2mm |
14 |
10mm |
| 4 – 32mm x 2mm |
15 |
10mm |
| 4 – 39mm x 2-3mm |
14 |
10mm |
| 5 – 28mm |
7 |
10mm |
| 5 – 28.3mm |
10 |
10mm |
| 5 – 35mm x 2-3mm |
13 |
13mm |
| 6 – 18mm x 2mm |
7 |
10mm |
| 6 – 20mm x 2mm |
8 |
10mm |
| 6 – 24mm x 2mm |
10 |
10mm |
| 6 – 25mm |
7 |
10mm |
| 6 – 26.75mm |
8 |
10mm |
| 6 – 30mm x 2mm |
13 |
10mm |
| 6 – 30.5mm |
10 |
10mm |
| 6 – 32mm |
8 |
10mm |
| 6 – 32mm |
9 |
10mm |
| 6 – 37mm |
12 |
10mm |
| 6 – 38mm |
12 |
10mm |
| 6 – 40mm |
16 |
13mm |
| 9 – 36mm x 3mm |
10 |
12mm |
| 10 – 20mm x 1mm |
11 |
10mm |
| 12 – 20mm x 1mm |
9 |
10mm |
| 12.5 – 30.5mm |
7 |
12mm |
| 13 – 38mm |
10 |
12mm |
| 14 – 24mm x 2mm |
6 |
13mm |
| 14 – 25mm |
7 |
13mm |
| 20 – 30mm x 1mm |
11 |
13mm |
| 20 – 34mm x 2mm |
8 |
13mm |
| 30 – 40mm x 1mm |
11 |
13mm |
| 40 – 50mm x 1mm |
11 |
13mm |
| 50 – 60mm x 1mm |
11 |
13mm |
| 5 – 30.5mm |
13 |
12mm |
| 5 – 38mm |
14 |
12mm |
