Changsha Sollroc Engineering Equipments Co., Ltd
FOCUS IN MANUFACTURING OF HIGH QUALITY DTH AND RC DRILLING TOOLS.
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High Speed Drilling Hammer Down The Hole Hammer 4 Inch Hammer Without Footvalve For Shank SD4
High Air Pressure DTH Hammer (without foot valve)
It's a king of high air pressure DTH hammer without footvalve,our newest design. it's also one of the most advanced DTH hammer in the world.
It has the following 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.
According to your request, the top sub can be made into two spanners, an air controlling hole can be drilled on the check valve to provide more efficient cuttings discharge.
Products specifications:
| Shank | Fit SD4 shank |
| Length (less bit) | 1012mm |
| Outer diameter | 99mm |
| Top sub thread | API 2 3/8" REG pin |
| Weight (less bit) | 40kg (88lbs) |
| Hole range | 110mm-135mm |
| Working pressure | 10-25bar |
| Impact rate at 1.7 Mpa | 30Hz |
| Recommended rotation speed | 25-40r/min |
| Air consumption at 7-14 bar | 211-494CFM |
Our SD-A serises (without footvalve/Nylon tube) DTH hammer specifications:
| DTH hammer type | SD4A | SD5A | SD6 | |
| Length(less bit) mm | 1012 | 1090 | 1182 | |
| Weight(less bit) kG | 40kg(88lbs) | 70kg(143lbs) | 90kg (198lbs) | |
| External diameter mm | Φ99 | Φ125 | Φ148 | |
| Bit shank | SD4 | SD5 | SD6 | |
| Hole range(mm) | Φ110-135mm | Φ135-155mm | Φ146-148mm | |
| Connection thread | API 2 3/8"Reg | API 2 3/8"Reg | API 3 1/2"Reg | |
| Working pressure | 1.0-2.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | |
| Impact rate at 1.5-1.7Mpa | 30Hz | 28Hz | 25Hz | |
| Recommended Rotation speed | 25-40r/min | 20-35r/min | 20-30r/min | |
| Air consumption | 1.0Mpa | 6m3/min | 7m3/min | 9m3/min |
| 1.8Mpa | 9m3/min | 14m3/min | 18m3/min | |
| 2.4Mpa | 14m3/min | 19m3/min | 26m3/min | |
| DTH hammer type | SD8A | SD10A | SD12A | |
| Length(less bit) mm | 1330 | 1525 | 1860 | |
| Weight(less bit) kg | 175kg(374lbs) | 316kg(695lbs) | 480kg(1056lbs) | |
| External diameter mm | Φ185mm | Φ185mm | Φ275mm | |
| Bit shank | SD8 | SD10 | SD12 | |
| Hole range(mm) | 195mm-254mm | 254mm-311mm | 305mm-445mm | |
| Connection thread | API 4 1/2"Reg | API 6 5/8" REG | API 6 5/8" REG | |
| Working pressure | 1.0-3.0Mpa | 1.0-3.0Mpa | 1.0-3.0Mpa | |
| Impact rate at 1.7Mpa | 22Hz | 20Hz | 20Hz | |
| Recommended Rotation speed | 15-25r/min | 15-25r/min | 15-25r/min | |
| Air consumption | 1.0Mpa | 12m3/min | 22m3/min | 28m3/min |
| 1.8Mpa | 22m3/min | 40m3/min | 50m3/min | |
| 2.4Mpa | 28m3/min | 65m3/min | 71m3/min | |
The information you may like to know before order:
SOLLROC Provide high efficiency and durable hammer all over the world.
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