The life of the DTH bit depends on the material and technology of the bit. The bit is made of the most efficient high quality alloy steel. Use quality forged steel, heat treatment and shot peening to provide a durable and reliable balance of strength and toughness.
| Bit size |
Shank type |
Recommended DTH bit diameter |
| 3.5"/3" DTH Hammer bits |
COP34, DHD3.5, MISSION30, BR3 shank |
90mm to 105mm |
| 4" DTH Hammer bits |
DHD340, QL40, MISSION40, SD4 shank |
110mm to 130mm |
| 5" DTH Hammer bits |
DHD350, QL50, MISSION50, SD5 shank |
134mm to 152mm |
| 6" DTH Hammer bits |
DHD360, QL60, MISSION60, SD6 shank |
152mm to 203mm |
| 8" DTH Hammer bits |
DHD380, QL80, MISSION80, SD8 shank |
203mm to 305mm |
| 12" DTH Hammer bits |
DHD112, SD12 and QL120 shank |
Available upon customers' request |