Blasting Tools Down The Hole Drilling 5 Inch HD55 DTH Hammer For
Hard Rock
Product description
A down-the-hole drill, usually called DTH by most professionals, is
basically a mini jackhammer screwed on the bottom of a drill
string. The fast hammer action breaks hard rock into small flakes
and dust and is blown clear by the air exhaust from the DTH
hammer.The DTH hammer is one of the fastest ways to drill hard
rock. Now smaller portable drillcat drilling rigs with DTH hammers
can drill as fast as much larger truck rigs with this newer
technology.
DTH Hammers Specification:
| shank | DHD350R/COP54 |
| Length(less bit) | 1214mm |
| External diameter | 125mm |
| Top sub thread | API 2 3/8"REG API 3 1/2"REG |
| Weight(less bit) | 77.5kg |
| Hole range | 135mm-155mm |
| Working pressure | 1.0-2. 5Mpa |
| Impact rate at 1.4Mpa | 25Hz |
| Recommended rotation speed | 20-35r/min |
| 1.0Mpa | 9m³/min |
| Air consumption 1.8Mpa | 15m³/min |
| 2.4Mpa | 23m³/min |
Product Advantages:
1. valveless air distribution. More reliable.
2. simple design of the piston, long life.
3. More efficient energy transfer, faster drilling speed, lower air
consumption and lower oil consumption.
4. fewer internal parts, simple structure, longer life, less
failure and easier to maintain becayse all the parts are heat
treated.
5. It is easy to disassemble because the top sub, the drive chuck
and the external cylinder are connected by multi-step thread.
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.
