Hydraulic Bridge Jack, Post Tension Jack, Tensioning Jack manufacturer / supplier in China, offering Large Tonnage Post Tension Jack Tensioning PC Strands Pulling System, Cold Extrusion Steel Coupler Carbon Connetor Rebar Threading Couplers, Upset Forging Rebar Threading Coupler Connecting Coupling and so on.
Min. Order / Reference FOB Price | |
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1 Piece | US $1200.00/ Piece |
Local Area: | Xian, Shaanxi, China |
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R&D Capacity: | OEM, ODM, Other |
Payment Terms: | LC, T/T, D/P, PayPal, WesternUnion, Small-amountpayment |
Certification: | CE, ISO 9001:2000 |
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Condition: | New |
Motor: | AC Motor |
Description of Down the hole drilling|rotary|diamond hammer
Withdown the hole hammer drilling, the drill principle consists of a combination Paper Machinery of percussion and rotation. Unlike the top hammer, here the hammer drill is located directly in the borehole. These devices, known as 'down-the-hole hammers', are connected to the rotating drill pipes.
Thedown the hole hammer drilling rigis driven directly by the flushing medium. Compressed air is usually used for this purpose. Special procedures, though, can also involve flushing with water. The flushing medium is pressed through the drill pipes, down-the-hole hammer and drill bit and is forced back oAgricultural Machinery ut at the mouth of the borehole, along with the loosened drill cuttings, through the annular gap between the drill pipes and the borehole wall.
Down-the-hole hammersare mainly used for drilling boreholes into hard rock in bedrock. These boreholes serve as anchor holes, blast holes, injection holes and pilot holes.
In the field of anchoring technology, this process can be used to produce both short- and long-term anchors. Typical applications include:Anchored retaining walls,Slope stabilisation,Building pit supports,Braces
Advantages of Down the hole drilling rig:
Parameters of Down the hole drilling rig: