In DTH drilling, the rock drilling bit is a continuation of the shank, which the rock drill piston strikes directly. Since the piston is in direct contact with the drill bit, little energy is lost. This gives DTH drilling a nearly constant penetration rate regardless of hole length.
DTH drill bits are divided into high pressure, low pressure two series. It is made by high quality raw material with advanced produce technology. DTH drill bit is widely used in earthwork engneering, mining, water well drilliing, construction.
|Bit size||Shank type||Recommended DTH bits diameter|
|3.5”/3” DTH hammer bits||COP34, DHD3.5, MISSION30, BR3 shank||90mm~ 105mm|
|4” DTH hammer bits||DHD340, QL40, MISSION40, SD4 shank||110mm~ 130mm|
|5” DTH hammer bits||DHD350, QL50, MISSION50, SD5 shank||134mm~ 152mm|
|6” DTH hammer bits||DHD360, QL60, MISSION60, SD6 shank||152mm~ 203mm|
|8” DTH hammer bits||DHD380, QL80, MISSION80, SD8 shank||203mm~ 305mm|
|12” DTH hammer bits||DHD112, SD12 and QL120 shank.||Available upon to customers’ request|