Down the hole rock tools (drilling tools) are rock drilling
equipment which takes compressed air as power source to partially
transfer impact power into drilling holes. An air distributing
device in a top hammer controls a piston to move back and forth. An
impact device arranged in the front of the top hammer transfers the
impact powderto a down-the-hole bit to crush rocks.
1. Based on previous experience of ordinary hammers, combined with
the features of reverse circulation hammer, optimized internal
structure and ideal energy transfer, thus ensuring the series of
hammers drilling with fast, smooth and continuous sampling.
2. The internal structure is very simple with components of high
rigidity, thus ensuring long life and easy maintenance of the
3. The collection tube adopts an integrative design and can be
replaced without disassembling the hammer. With carburizing
treatment, it has good abrasive resistance.
4. Equipped with bits designed with patent. Simply by replacing the
drill bit, the same hammer
can drill holes of different sizes ensuring that the sample is not
5. In difficult conditions such as loose soil, hard rock and plenty
of water exists, sampling can be done well.
It is mainly used in geological exploration, coal mine, water
conservancy and hydropower, highway, railway, bridge, construction
and so on.
NSD Series High Air Pressure DTH Hammers Without Foot Valve
|Connection Thread||API2 3”/8REG|
|API3 1”/2REG||API4 1”/2REG||AP6 5”/8REG||API6 5”/8REG|
|Impact Rate at 17 Bar||30HZ||28HZ||25HZ||22HZ||20HZ||20HZ|
|Recommended Rotation Speed||25-40r/min||20-35r/min||20-30r/min||15-25r/min|
1.Price commitment: in order to ensure the high reliability of
products, raw material selection are using grapefruit brand
products; under the same competitive conditions, and not to reduce
product technical performance on the basis of sincerity at a
favorable price to customers.
2.Quality commitment: product manufacturing and testing have
quality records and inspection data; the performance of the product
can withstand customer inspection.
3.Customer service: in order to create new diamond brand, enhance
the visibility of enterprises,establish corporate image, we serve
customers with the principle of "preferential prices, good service,
reliable product quality" principle.
The appearance of the picture is different from that of the actual
product, and the actual product is the standard.
|NSD Series High Air Pressure DTH Hammers Without Foot Valve|
|2,“O” Ring Of Top Sub||0.10||0.015||0.015||0.015||0.03||0.04|
|11,“O” Ring Of Stop Ring||0.005||0.01||0.01||0.01||0.01||0.01|