Blue Boring Machine Parts Borewell Drilling Hammers For High Working Air Pressure

Basic Information
Place of Origin: Hunan, China (Mainland)
Brand Name: New Diamond
Certification: ISO9001:2008
Model Number: NM series Hammer
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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Detail Information
Type: Hammer Processing Type: Forging
Use: Ore Mining Color: Required
Machine Type: Drilling Equipment Material: Alloy Steel

Product Description

Characteristic advantage


1 adopts the industry's leading heat treatment technology, and the steel hardness and wayward products are in the leading position.

2 alloy teeth adopt professional technology to greatly improve the strength of alloy teeth.

3 perfect after-sales security system and after-sales service tracking, the perfect solution to any problem of customers.




The new diamond dart impactor uses the latest drilling theory to design impactor, which enables the impactor to get the best energy transfer, fast drilling speed and low air consumption. The best quality of raw materials and the most advanced processing technology, stable performance and long life. Easy to use, easy to install and disassemble, easy to repair and easy to repair.


With professional manufacturing experience in DTH hammer production, our factory can supply you with high pressure and medium to low pressure DTH hammers. It strictly matches with API standard and other Chinese industry standards.It is durable for being produced with advanced craftwork and good material.

It also has the followingadvantages:

1. Deliver maximum energy to drilling bit, fast drilling speed and low air consumption due to the special inner structure of DTH hammer designed according to newest rock drilling theory.


2. Smooth performance and long service life of DTH hammer due to high quality alloy steel materials and advanced processing technology adapted.


3. Low problem rate and easy to maintenance due to simple, reliable and easy assemble and disassemble inner structure of hammer.


4. Easy to depart bit from hammer due to multi—head thread connecting chuck and cylinder of hammer.


5. Interchangeable with DTH bit and drill pipe.




Widely used in mines, quarries, earthworks and other engineering drilling blasting hole, guardrail hole, mountain reinforcement, anchorage and other engineering holes, geothermal exploration hole, Well bore and other fields.



NM Series High Air Pressure DTH Hammers Without Foot Valve

Technical Data

Length(Without Bit) NM4A NM5A NM6A NM8A
1005mm 1110mm 1161mm 1338mm
Weight(Without Bit) 40.00kg 68.50kg 90.00kg 176.00kg
External Diameter Ø99mm Ø126mm

Ø142mm Ø144mm

Ø146mm Ø148mm

Bit Shank NM4 NM5 NM6 NM8
Hole Range Ø110-Ø135mm Ø155-Ø190mm Ø155-Ø203mm Ø195-Ø254mm
Connection Thread API2 3”/8REG

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 17 Bar 30HZ 28HZ 25HZ 22HZ
Recommended Rotation Speed 25-40r/min 20-35r/min 20-30r/min 15-25r/min
Air Consumption
















Contact Details

WhatsApp : 8618692219720