Spiral Flute original surface coating HSS Step Drill Bit
1. Material: HSS M2
2. Thermal treatment: Bit part 62-65HRC
Bit shank 40-50HRC
3. Surface treatment: bright white
(The surface of the drill bit without tipping blunt crack significant bump and grinding burn and influence the use performance defect, Product no surface rupture, burr, rust, black spots or other undesirable phenomenon)
4. Shank:SDS plus shank.( Hex shank, (CNC milling machine control, handle uniformity division. ) or 3 flat shank)
5. Flute type: spiral flute
Features;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 | Step Qty. | Shank Dia |
| 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 |