Foundation Drilling Equipment, Piling Rigs , Pile Driving Numa125 DTH hammer with DTH bit 400-550mm
"Down The Hole" (DTH) hammers provide the most versatile and cost effective rock drilling method available to date.
Drilling Supply offers an extensive range of DTH hammers suitable for a wide variety of drilling techniques and environments.
Changsha Tianhe Numa125 DTH hammer is designed for drilling piles in complex conditions with rock layers and hard boulders including hardest bed rock.
1. Advantages of construction method
Use:DTH Hammer drilling is a good way to drill through cave formation and avoid stuck problem
Cave:When encountering caves,drill bit inclines to the cave.The stabilizer ensures the hole straightness
Bit stuck；One reason is cave encounter,the drill bit deviates,and the entire set of drilling tools inclines in the hole.The other,is hole collapse.A large number of rock or clay catch the drill pipe,resulting in bit stuck.Steel casing and stabilizer can resolve this problem.
2. Detailed structure information
| | NUMA125 DTH Hammer(standard) | NUMA125 DTH Hammer(heavy duty) |
| Length(less bit) | 2235mm | 2235mm |
| Weight (less bit) | 850kg | 950kg |
| External diameter | 320mm | 330mm |
| Bits shank | NUMA125 | NUMA125 |
| Bits diameter | 400mm-0mm | 400-550MM |
| Connection thread | 273mm Hexagonal | 273mm Hexagonal |
| Air pressure | 1.7-2.5Mpa | 1.7-2.5Mpa |
* Hammers without footvalve are available.
* External diameter of hammer is adjustable according to customers' requests.
* Shock absorbers and Hexagonal Joints are available.
3. Product Application
- Large diameter overburden drilling
- Large diameter rock drilling
- Vertical and horizontal drilling
- On- and offshore foundation
4. Photos
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Pile Driving Numa125 Down Hole Hammer With 400-550mm DTH Bit 320/330mm OD Images
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