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

Alloy Steel Borewell Drilling Hammers

Alloy Steel Borewell Drilling Hammers

  • Alloy Steel Borewell Drilling Hammers
Alloy Steel Borewell Drilling Hammers
Product Details:
Place of Origin: Hunan, China (Mainland)
Brand Name: New Diamond
Certification: ISO9001:2008
Model Number: N 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
Contact Now
Detailed Product Description
Type: Hammers Processing Type: Forging
Use: Ore Mining Color: Required
Material: Alloy Steel Usege: Mining&Construction&Water Well Drilling
High Light:

rock mining tools


oil drilling tools


Alloy Steel Borewell Drilling Hammers


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) N100 N120 N125
1510mm 1900mm 1900mm
Weight(Without Bit) 288.00kg 485.00kg 485.00kg
External Diameter Ø226mm Ø275mm Ø275mm
Bit Shank NUMA100 NUMA120 NUMA125
Hole Range Ø254-Ø311mm Ø305-Ø445mm Ø30-Ø445mm
Connection Thread

API4 1”/2REG

API6 5”/8REG

API6 5”/8REG API6 5”/8REG
Working Pressure 2.0-3.5Mpa 2.0-3.5Mpa 2.0-3.5Mpa
Impact Rate at 17 Bar 18HZ 18HZ 16HZ
Recommended Rotation Speed 15-25r/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.


N Series High Air Pressure DTH Hammers With Foot Valve
Item Description Weight(kg)
N100 N120 N125
1,Top Sub 59.00 70.00 70.00
2,“O” Ring Of Top Sub 0.03 0.04 0.04
3,Breakout Ring 0.40 0.80 0.80
4,Chenck Valve 1.60 3.00 3.00
5,Spring 0.30 0.10 0.10
6,Compression Buffer 0.60 1.00 1.00
7,Air Distributor 11.50 20.00 20.00
8,Internal Cylinder 11.00 23.00 23.00
9,Piston 62.00 125.00 125.00
10,External Cylinder 112.00 170.00 170.00
11,Guided Sleeve - 18.00 -
12,“O” Ring Of Stop Ring 0.03 0.04 0.01
13,Stop Ring 1.50 4.50 4.00
14,Breakout Ring 0.40 0.80 0.80
15,Drive Chuck 26.00 49.0 45.00
16,Drill Bit 115.00 129.00 175.00

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.
Mobile Site Privacy Policy | China Good Quality DTH Hammer Bits Supplier. © 2017 - 2022 All Rights Reserved.