4'' High Air Pressure DTH Hammer Without Footvalve HD45A For Water
Well Drilling
Product description
A down-the-hole hammer provides a solution to the problem of
removing hard rock barriers encountered in a bore. The DTH hammer
resembles a small jack hammer. It screws onto the end of a drill
string like a section of drill pipe. Like the jack hammers used
above ground, it's air-powered with a high cyclic rate; unlike jack
hammers above ground, it combines its fast-action hammer with a
rotary, drilling action. This combined action rotates its
chisel-like tip as it drives into the rock, breaking it into chips
and dust. Because the DTH hammer is pneumatically powered, it has
an air exhaust, which blows the chips and dust from the bore.
Product Advantages:
1. By using the latest rock drilling theory, optimizing the inside
structure and the size of the air distribution, to make the DTH
Hammer obtain the optimal energy transfer and make it achieve
faster drilling speed and lower air consumption.
2. For such projects as the drill bit break, retrieving very
difficult, we specially designed a safe and reliable anti-shedding
device for the bit.
3. The check valve can be replaced to the one with bigger ail
controlling hole to provide more efficient cuttings discharge.
4. The top sub and the drive chuck have special thread, which can
achieve an easier disassemble.
DTH Hammer specification:
| shank | HD45A |
| Length(less bit) | 1011mm |
| External diameter | 92mm/99mm(optional) |
| Top sub thread | API 2 3/8"REG |
| Weight(less bit) | 39kg |
| Hole range | 110mm-130mm |
| Working pressure | 1.0-2. 5Mpa |
| Impact rate at 1.4Mpa | 30Hz |
| Recommended rotation speed | 22-35r/min |
| 1.0Mpa | 6m³/min |
| Air consumption 1.8Mpa | 10m³/min |
| 2.4Mpa | 15m³/min |
Face shape Features
Drop Center
For high penetration rates in soft to medium hard and fissured rock
formations. Low to medium air pressures. Maximum hole deviation
control.
Concave Face
The all-round application bit face special for medium hard and
homogenerous rock formations. Good hole deviation control and good
flushing capacity.
Convex Face
For high penetration rates in soft to medium-hard with low to
medium air pressures. It is the most resistance to steel wash, and
may reduce the load and wear on the gauge buttons, but poor hole
deviation control.
Flat Face
This kind of face shape is suitable for very hard and abrasive rock
formations in applications with high air pressures. Good
penetration rates an resistance to steel wash.
Double Gauge Face
This kind of face shape is suitable for fast penetration rates in
medium to hard rock formations. Designed for high air pressures and
good resistance to steel wash step gauge bit.
Product application
At present, DTH drilling tool is widely used in underground mining,
quarries, hydraulic and Hydro-Power Engineering, water well
drilling, Mineral exploration, anchoring hole drilling, geothermal
engineering, Subway excavation, another civil engineering.
DTH is one of the most efficient ways of drilling rock, using a
rapid hammer action to break the rock into sizeable chips which are
then evacuated from the bore hole by the air exhausted from the DTH
Hammer. The technique provides fast drilling of accurately aligned,
straight and clean holes in most ground conditions.
Company informaiton
At sollroc, customer satisfaction is our top priority. Our sales
team takes a proactive approach in meeting customers’ needs. We
take the time to get to know you and learn about your operations so
we can better assist you. We strive to meet customers’ needs by
supplying the tools and equipment you need when you need them,
providing product support, and following through with excellent
customer service every step of the way.
