5'' HD55 Alloy Steel Down The Hole Hammer without Footvalve for
Mining
Product description
Down - the - hole drilling, usually called DTH by most
professionals, is performed by a mini jackhammer screwed on the
bottom of a DTH drilling rig. The fast hammer action of the DTH
drilling rig machine breaks hard rock into small pieces and dust
and is blown clear by the air exhaust from the DTH hammer. DTH
hammer is one of the fastest ways to drill hard rock and land. Now
smaller portable drilling rig with DTH hammers can drill as fast as
those much larger truck rigs with this newer and efficient
technology.
Product Advantages:
1. Out of the trouble of foot valve fracture and expansion and
contraction.
2. Lower energy consumption and higher impact frequency. The
drilling speed is 15%-30% higher than the one with foot valve.
3. Simple structure, reliable parts, long life, easy and cheap
maintenance.
4. Lower air and oil consumption. The oil consumption is about 10%
lower than the one with foot valve.
DTH Hammer specification:
| shank | DHD350R/COP54 |
| Length(less bit) | 1110mm |
| External diameter | 116mm/125mm(optional) |
| Top sub thread | API 2 3/8"REG API 3 1/2"REG API 2 7/8'' REG |
| Weight(less bit) | 66kg |
| Hole range | 127mm-155mm |
| Working pressure | 1.0-2. 5Mpa |
| Impact rate at 1.4Mpa | 28Hz |
| Recommended rotation speed | 20-35r/min |
| 1.0Mpa | 7m³/min |
| Air consumption 1.8Mpa | 13-14m³/min |
| 2.4Mpa | 18-19m³/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.
