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Hunan New Diamond Construction Machinery Co., Ltd.
Hunan New Diamond Construction Machinery Co., Ltd.
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Alloy Steel Borewell Drilling Hammers

Hunan New Diamond Construction Machinery Co., Ltd.
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Alloy Steel Borewell Drilling Hammers

Brand Name : New Diamond
Model Number : N series
Certification : ISO9001:2008
Place of Origin : Hunan, China (Mainland)
MOQ : Negotiable
Price : Negotiable
Payment Terms : L/C, T/T, Western Union
Supply Ability : According to order quantity
Delivery Time : 5-8 work days
Packaging Details : Carton packaging and wooden box packing
Type : hammers
Processing Type : Forging
Use : Ore Mining
Color : Required
Material : Alloy Steel
Usege : Mining&Construction&Water Well Drilling
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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. according to China's mining conditions, to absorb the advanced technology of domestic and foreign impactor and design and manufacture of the latest products.

2. reasonable selection of materials, advanced manufacturing technology, quality assurance perfect.

3. has higher drilling speed.

4. can provide hardening treatment in order to prolong the service life and reduce the cost of use.

5. single impact power is large, and the power consumption of broken rock is low.

6. piston and bit weight to have the best momentum transfer.

7. the modern theory is adopted in the structural design, which makes the stress wave duration longer, the stress amplitude is lower, and the piston life is long.


It is mainly used in geological exploration, coal mine, water conservancy and hydropower, highway, railway, bridge, construction and so on.


N Series High Air Pressure DTH Hammers With Foot Valve

Technical Data

Length(Without Bit)N100N120N125
Weight(Without Bit)288.00kg485.00kg485.00kg
External DiameterØ226mmØ275mmØ275mm
Bit ShankNUMA100NUMA120NUMA125
Hole RangeØ254-Ø311mmØ305-Ø445mmØ30-Ø445mm
Connection Thread

API4 1”/2REG

API6 5”/8REG

API6 5”/8REGAPI6 5”/8REG
Working Pressure2.0-3.5Mpa2.0-3.5Mpa2.0-3.5Mpa
Impact Rate at 17 Bar18HZ18HZ16HZ
Recommended Rotation Speed15-25r/min15-25r/min15-25r/min
Air Consumption










Feature Advantage

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.

N Series High Air Pressure DTH Hammers With Foot Valve
Item DescriptionWeight(kg)
1,Top Sub59.0070.0070.00
2,“O” Ring Of Top Sub0.030.040.04
3,Breakout Ring0.400.800.80
4,Chenck Valve1.603.003.00
6,Compression Buffer0.601.001.00
7,Air Distributor11.5020.0020.00
8,Internal Cylinder11.0023.0023.00
10,External Cylinder112.00170.00170.00
11,Guided Sleeve-18.00-
12,“O” Ring Of Stop Ring0.030.040.01
13,Stop Ring1.504.504.00
14,Breakout Ring0.400.800.80
15,Drive Chuck26.0049.045.00
16,Drill Bit115.00129.00175.00

Product Tags:

rock mining tools


oil drilling tools

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