HSS fully grounded DIN340 twist drill bit
| 1.Size range: 0.2-20mm | |||
| 2.Surface finishing: Black,Black&white,Rainbow,Titanium coated | |||
| *Surface finishing will highly improve the drill bit’s life span. | |||
| 3.Right-hand cutting,type N | |||
| 4.Material we use for roll forged drill bit:HSS 4241,HSS 4341,HSS M2,HSS M35 | |||
| 5.Cylindrical shank,118°or 135° split point conical section. | |||
| 6.Diameter tolerance h8 | |||
| 7.In all rotary and percussion drilling machines, for drilling in steel, sintered metal, non-ferrous metal and plastics |
Manufacturing Standard: DIN338(jobber series), DIN1897(stub series), DIN340(long series), DIN1869, DIN341, DIN345, DIN1870.
Target market:Roll forging is cost-effective for DIY market users.
| Drill Diameter | Flute Length | Overall Length |
| (mm) | (mm) | (mm) |
| 1 | 33 | 56 |
| 1.5 | 45 | 70 |
| 2 | 56 | 85 |
| 2.5 | 62 | 95 |
| 3 | 66 | 100 |
| 3.2 | 69 | 106 |
| 3.5 | 73 | 112 |
| 4 | 78 | 119 |
| 4.2 | 78 | 119 |
| 4.5 | 82 | 126 |
| 5 | 87 | 132 |
| 5.2 | 91 | 139 |
| 5.5 | 91 | 139 |
| 6 | 91 | 139 |
| 6.5 | 97 | 148 |
| 7 | 102 | 156 |
| 7.5 | 102 | 156 |
| 8 | 109 | 165 |
| 8.5 | 109 | 165 |
| 9 | 115 | 175 |
| 9.5 | 115 | 175 |
| 10 | 121 | 184 |
| 10.5 | 121 | 184 |
| 11 | 128 | 195 |
| 11.5 | 128 | 195 |
| 12 | 134 | 205 |
| 12.5 | 134 | 205 |
| 13 | 134 | 205 |
