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.
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5 Inch HD55 Shank DTH Hammer For Hard Rock Drilling Images
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