SD8A DTH Hammer
SD 8 Down The Hole Hammer
SD 8A DTH Hammer SD 8 Down The Hole Hammer for Stone Quarrying Drilling
Down The Hole Hammer, i.e. Pneumatic impactor, also known as pneumatic impactor, pneumatic dive hammer. To the compressed air as the power medium, the use of compressed air energy to produce continuous impact load hole at the end of power equipment.
Compressed air at the same time can also doubles as a wash hole medium. Pneumatic impactor has high wind pressure and low wind pressure, valve type and no valve type of points. Usually the pneumatic impactor directly connected with the carbide rod tooth drill to impact the way rock, low-speed rotation is not coring the full drilling. Mainly used in hydrological wells drilling, non core geological drilling, geological disaster prevention and control projects and mine drilling and other fields. Suitable for use in gravel and hard rock formations, specially configured drill bits can also be used in soft soil. Mechanical drilling speed is generally much higher than the hydraulic impactor drilling, but need to be equipped with a larger capacity of the air compressor, fuel consumption, noise, dust pollution. Drilling depth by the groundwater level, the greater the impact of water.
It is a kind of high air pressure DTH Hammer without footvalve, our newest design. It is also one of the most advanced DTH Hammers in the world.
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.
|Length (exclude bit)||Weight (exclude bit)||External Diameter||Bit Shank||Hole Range||Connection Thread|
|1330 mm||174.00 kg||Φ180 mm||SD8||Φ195mm ~ Φ254mm||API 4 1/2'' Reg|
|Working Pressure||Impact rate at 0.5 MPa||Recommended Rotary Speed||Air Consumption|
|1.0 MPa||1.8 MPa||2.4 MPa|
|1.0 ~ 2.5 MPa||22 Hz||15 ~ 25 rpm||12 m³/min||22 m³/min||28 m³/min|
|DTH hammers Specifications|
|Hammer Size||Bit Shank||ROSCHEN Code||Connection Thread||Suitable bit||Working pressure||Air consumption|
|2"||BR2||ROS 11 ROS 22||RD50 box||￠70-￠90mm||0.7-1.75Mpa||0.7Mpa||4.5m3/min|
|3"||DHD3.5||ROS 32||API 2 3/8" Reg||￠90-￠110mm||1.0-1.5Mpa||1.0Mpa||4.5m3/min|
|4"||DHD340||ROS 34||API 2 3/8" Reg||￠110-￠135mm||1.0-2.5Mpa||1.0Mpa||6m3/min|
|5"||DHD350||ROS 52 ROS 54||API 2 3/8"Reg/API 3 1/2" Reg||￠135-￠155mm||1.0-2.5Mpa||1.0Mpa||9m3/min|
|6"||DHD360||ROS 62 ROS 64||API 3 1/2" Reg||￠155-￠190mm||1.0-2.5Mpa||1.0Mpa||10m3/min|
|8"||DHD380||ROS 82 ROS 84||API 4 1/2" Reg||￠195-￠254mm||1.0-2.5Mpa||1.0Mpa||15m3/min|
|10"||SD10||ROS 100||API 6 5/8" Reg||￠254-￠311mm||1.0-2.5Mpa||1.0Mpa||22m3/min|
|12"||DHD1120||ROS 120||API 6 5/8" Reg||￠305-￠445mm||1.0-2.5Mpa||1.0Mpa||30m3/min|
|Notes: Metzke, Remet thread is available!|
For more information please contact:
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED
Skype: ROSCHEN.TOOL , ROSCHEN_GROUP
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