D908 Combined Drill and Countersink 60°
METRIC
DIN
- 60° Combined drill and countersink centre drill.
- Improved strength design for cutting different steels below 48HRC, cast iron, aluminium and copper.
- Application for centre hole preparations for lathe and Cylindrical grinding.
Steel < 48HRC
P | H | M | K | N | S |
---|---|---|---|---|---|
Work Material
P | H | M | K | N | ||||
---|---|---|---|---|---|---|---|---|
GR1 | GR2 | GR3 | GR4 | GR5 | GR8 | GR9 | GR10 | GR11 |
Carbon Steel | <24HRC Low-alloyed Steel | <30HRC Hi-alloyed Steel | 30~38HRC Hardened Steel | 38~48HRC Hardened Steel | Stainless Steel | Cast Iron | Aluminium | Copper |
Product Specification
Dc | Lc | L | d |
---|---|---|---|
h7 | mm | mm | h5 |
0.5 | 0.8 | 38 | 3 |
0.8 | 1.1 | 38 | 3 |
1 | 1.3 | 38 | 3 |
1.25 | 1.6 | 38 | 3 |
1.6 | 2 | 38 | 4 |
2 | 2.5 | 50 | 5 |
2.5 | 3.1 | 50 | 6 |
3.15 | 3.9 | 63 | 8 |
4 | 5 | 66 | 10 |
5 | 6.3 | 73 | 12 |