28Inch DTH Hammer With Shank TH28 Bit For Large Hole Foundation Piling Water well drillinging
"Down The Hole" (DTH) hammers provide the most versatile and cost effective rock drilling method available to date.
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
| | TH28 DTH hammer |
| Length(less bit) | 2610mm |
| Weight (less bit) | 4236kg |
| External diameter | 650mm |
| Bits shank | TH28 |
| Bits diameter | 800mm-1000mm |
| Connection thread | 320mm Hexagonal |
| Air pressure | 1.0-2.5Mpa |
* 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
-----Widely applied for complex rock formations like caves,pebbles,fissures etc
-----Drilling through hard rocks with high rate of penetration
-----Low air consumption
4. Site information
