Hunan New Diamond Construction Machinery Co., Ltd.
Hunan New Diamond Construction Machinery Co., Ltd.

Hunan New Diamond Construction Machinery Co., Ltd.

Home ProductsDown The Hole Hammer

DTH Hammer Well Drilling

DTH Hammer Well Drilling

  • DTH Hammer Well Drilling
DTH Hammer Well Drilling
Product Details:
Place of Origin: Hunan, China (Mainland)
Brand Name: New Diamond
Certification: ISO9001:2008
Model Number: NQL series
Payment & Shipping Terms:
Minimum Order Quantity: Negotiable
Price: Negotiable
Packaging Details: Carton packaging and wooden box packing
Delivery Time: 5-8 work days
Payment Terms: L/C, T/T, Western Union
Supply Ability: According to order quantity
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Detailed Product Description
Type: Hammers Processing Type: Forging
Use: Ore Mining Color: Required
Material: Alloy Steel Application: MARBLE QUARRY OR WELL DRILLING
High Light:

rock mining tools


oil drilling tools


Well Drilling DTH Hammer


When percussion or hammer drilling the percussion mechanism is called a DTH or down the hole hammer. This drilling tool is located directly above the down hole hammer bit. The driller transfers weight to the bit through the drill pipe as well as provides some rotation. Through the use of a compressor, the pressurized air is forced to the down hole hammer. As the drilled hole gets deeper the driller adds more drill pipe to the string. The piston strikes the impact zone of the hammer bit; hammers are always used as part of a casing advancement system and can be used in reverse circulation applications. DTH hammers are common when drilling blast holes and water wells.

Suitable choice of raw material, advanced processing technology and perfect quality warranty.
With hardened treatment, drilling life can be extended and then cost can be reduced.

Size range 1-2’’,3 ’’, 4’’, 5’’, 6’’, 8’’, 10’’, 12’’ etc.

Shank styles:









SD4, SD5, SD6, SD8,SD10,SD12;





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




NQL Series High Air Pressure DTH Hammers Without Foot Valve

Technical Data

Length(Without Bit) NQL4A NQL5A NQL6A NQL8A NQL95A
1070mm 1090mm 1183mm 1330mm 1340mm
Weight(Without Bit) 40.00kg 67.00kg 90.00kg 171.00kg 203.00kg
External Diameter Ø99mm Ø126 mm Ø165mm Ø180/Ø185mm Ø203mm
Bit Shank QL40 QL50 QL600 QL80 QL80
Hole Range Ø110-Ø135mm Ø155-Ø203mm Ø155-Ø203mm Ø195-Ø254mm Ø216-Ø254mm
Connection Thread API2 3”/8REG

API2 3”/8REG

API3 1”/2REG

API2 7”/8REG

API3 1”/2REG API4 1”/2REG API4 1”/2REG
Working Pressure 1.2-2.0Mpa 1.3-2.3Mpa 1.5-2.5Mpa 1.5-3.0Mpa 1.8-3.0Mpa
Impact Rate at 17 Bar 30HZ 28HZ 25HZ 22HZ 22HZ
Recommended Rotation Speed 20-30r/min 20-35r/min 20-30r/min 15-25r/min 15-25r/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.




The appearance of the picture is different from that of the actual product, and the actual product is the standard.



DTH Hammer Well Drilling 0
NQL Series High Air Pressure DTH Hammers Without Foot Valve
Item Description Weight(kg)
1,Top Sub 6.50 13.70 20.00 34.00 35.00
2, “O” Ring Of Top Sub 0.01 0.015 0.015 0.015 0.01
3,Breakout Ring - - - 0.30 0.04
4,Chenck Valve 0.35 0.70 0.70 1.20 1.20
5,Spring 0.05 0.10 0.10 0.10 0.10
6,Air Distributor 1.50 2.00 3.50 6.00 7.00
7,Internal Cylinder 2.10 2.70 4.20 6.50 7.50
8,Piston 8.50 15.00 23.00 42.50 48.00
9,External Cylinder 15.20 24.00 30.00 59.00 75.00
10,Guided Sleeve 1.80 3.00 4.00 6.30 12.00
11,“O” Ring Of Stop Ring 0.005 0.01 0.01 0.01 0.01
12,Stop Ring 0.20 0.40 0.60 1.40 1.70
13,Breakout Ring - - - 0.30 0.40
14,Drive Chuck 3.20 4.50 5.50 13.00 15.00
15,Drill Bit 9.00 16.00 25.00 35.00 50.00

Contact Details
Hunan New Diamond Construction Machinery Co., Ltd.

Contact Person: Rick.liao

Tel: +8618692219720

Send your inquiry directly to us
Hunan New Diamond Construction Machinery Co., Ltd.
PinJiang Industry Park,PingJiang county,YueYang City,Hunan,China.
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