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

Hunan New Diamond Construction Machinery Co., Ltd.

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NQL Series Well Hammer Premium Drilling Tools With Foot Valve For Shank

NQL Series Well Hammer Premium Drilling Tools With Foot Valve For Shank

  • NQL Series Well Hammer Premium Drilling Tools With Foot Valve For Shank
NQL Series Well Hammer Premium Drilling Tools With Foot Valve For Shank
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
Machine Type: Drilling Equipment Usege: Mining&Construction&Water Well Drilling
High Light:

dth hammer


oil drilling tools


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;





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.






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.




NQL Series High Air Pressure DTH Hammers With Foot Valve

Technical Data

Length(Without Bit) NQL4 NQL5 NQL6 NQL8
1097mm 1156mm 1212mm 1465mm
Weight(Without Bit) 41.00kg 73.00kg 95.00kg 182.00kg
External Diameter Ø99mm Ø126mm

Ø142mm Ø144mm

Ø146mm Ø148mm

Bit Shank QI40 QI50 QI60 QI80
Hole Range Ø110-Ø135mm Ø135-Ø155mm Ø155-Ø190mm Ø195-Ø254mm
Connection Thread API2 3”/8REG

API3 1”/2REG

API2 7”/8REG

API3 1”/2REG

API2 7”/8REG

2 7”/8 IF

API4 1”/2REG
Working Pressure 1.2-2.0Mpa 1.3-2.3Mpa 1.5-2.5Mpa 1.5-3.0Mpa
Impact Rate at 14 Bar 27HZ 25HZ 23HZ 20HZ
Recommended Rotation Speed 25-40r/min 25-40r/min 20-30r/min 15-25r/min
Air Consumption

















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



NQL Series High Air Pressure DTH Hammers With Foot Valve
Item Description Weight(kg)
Top Sub 6.50 15.00 20.00 41.00
“O” Ring Of Top Sub 0.01 0.015 0.02 0.02
Breakout Ring       0.30
Chenck Valve 0.42 1.00 1.00 1.50
Spring 0.04 0.10 0.10 0.10
Compression Buffer 0.04 0.10 0.10 0.42
Air Distributor 2.20 3.50 6.00 13.00
Internal Cylinder 2.30 4.20 5.00 8.60
Piston 9.00 19.00 23.50 41.00
External Cylinder 16.50 24.60 31.00 60.00
Guided Sleeve   0.90 1.00 2.20
“O” Ring Of Stop Ring 0.01 0.01 0.02 0.02
Stop Ring 0.30 0.40 0.60 1.20
Breakout Ring       0.30
Drive Chuck 3.00 4.60 5.40 12.00
Drill Bit 9.50 15.50 24.60 35.00

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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