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Mining bit DTH 6 inch 165mm button bits for rock drilling
Mining bit DTH 6 inch 165mm button bits for rock drilling
Mining bit DTH 6 inch 165mm button bits for rock drilling
Mining bit DTH 6 inch 165mm button bits for rock drilling
Mining bit DTH 6 inch 165mm button bits for rock drilling

Mining bit DTH 6 inch 165mm button bits for rock drilling

Different name:Pneumatic DTH bits/ air bits
Main application:for mining/well drilling/quarry/rock drilling/ blast hole drilling
Core specification parameters:COP66 high air pressure DTH bits
Applications:Widely used in mining, quarrying, exploration, water-well, geothermal, solar and construction/geotechnical drilling projects
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This 6 inch DTH hammer is designed for Atlas Copco Smart ROC D65 drill rig. Comparing to the COP 64 Gold, penetration of COP 66 is 15% faster and is more easily adjustable for feed force and rotation, making life easier for its operator and business more productive.


Code: 6 inch 66

Material: 25SiMnCrNi2MoVA

Tungsten carbide: YK05

Processing: Forging

Application: Mining, Blasting, Quarry, Water Well drilling

Bit Shank: COP66

Bit Diameter: 152-203mm

According the different shape of head, the DTH bits can be classified into flat face、convex face、drop center、Concave face bits. 

Flat Face Bit 

This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high air pressure. Good penetration rates an resistance to steel wash. 

Convex Face Bit 

For high penetration rates in soft to medium-hard with low to medium air pressure. It is the most resistance to steel wash, and may reduce the load and wear on gauge buttons, but poor hole deviation control. 

Drop Center Bit 

For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air pressure. Maximum hole deviation control. 

Concave Bit 

The all-around application bit face specifically for medium hard and homogeneous rock formations. Good hole deviation control and good flushing capacity.

Head ShapeHead Diameter(mm)Shank Length(mm)SplineButton TypeButton Size
COP66/DHD360Concave Face154308.58Domed8* Ø 18+ 4* Ø 16+4* Ø 15
Flat Face165308.58Domed8* Ø 18+ 6* Ø 16+3* Ø 16
Concave Face171308.58Domed8* Ø 18+ 6* Ø 16+4* Ø 15
Concave Face178308.58Domed8* Ø 18+ 6* Ø 16+5* Ø 15
Concave Face190308.58Domed9* Ø 18+ 6* Ø 16+5* Ø 15
Concave Face203308.58Domed10* Ø 18+ 8* Ø 16+6* Ø 15
Place of Origin:Made in China
Model Number:COP66 high air pressure DTH bits
Certification:COC/PVOC/FORM E/CO/ISO 9001
Minimum Order Quantity:1PCS
Packaging Details:Wooden cases or pallet
Delivery Time:7 working days
Competitive Advantage

High drilling efficiency

Due to its good performance of high penetration rate and minimal deviation tendency, our DTH bits have been exported to many different countries such as USA, South Africa, Ireland etc and won a good feedback.

Quality assurance

With many years experiences of production of DTH drilling tools, the DTH bits we made have long service life and high quality.

All around after-sales service

Our sales will response to any questions within 24 hours once we get. We pay great attention to the feedback from clients and satisfy them both on products and services.


The warranty period is six months since the DTH bits are delivered


DTH bit

DTH bits

DTH hammer package

DTH hammer

DTH package


1. What is a DTH hammer?

A DTH (Down-The-Hole) hammer is a pneumatically operated drilling tool used primarily in hard rock drilling. It sits directly behind the drill bit and uses compressed air to drive a piston, which strikes the drill bit, creating an impact force.

2. What is a DTH bit?

The DTH bit is the cutting tool attached to the end of the DTH hammer. It's designed with carbide buttons to penetrate tough rock formations effectively.

3. How does a DTH hammer and bit work?

During drilling, the DTH hammer and bit are lowered into the borehole. The hammer strikes the bit directly, breaking the rock, while compressed air flushes out rock cuttings and drives the hammer.

4. What are the advantages of using a DTH hammer and bit?

They are extremely efficient in hard rock formations, offering better energy transfer and deeper penetration compared to top hammer drills. This makes them ideal for mining, quarrying, and deep well drilling.

5. Can DTH hammers and bits be used for all types of rock?

They are particularly effective in very hard rock formations. However, their efficiency might vary in softer rock or different geological conditions.

6. What sizes do DTH hammers and bits come in?

They are available in a range of sizes, catering to various borehole diameters and depths, which allows for flexibility in different drilling projects.

7. In what applications are DTH hammers and bits commonly used?

They are widely used in mining, quarrying, water well drilling, geothermal drilling, and for creating blast holes in construction and mining operations.

8. How durable are DTH hammers and bits?

Both the hammer and the bit are designed to withstand the harsh conditions of deep rock drilling, ensuring durability and reliability in tough environments.

9. Do DTH hammers require special maintenance?

Regular maintenance, including inspection, cleaning, and lubrication, is crucial to ensure the longevity and efficiency of DTH hammers and bits.

10. Can the DTH bits be replaced independently of the hammer?

Yes, DTH bits can be replaced independently as they wear out. It's important to choose the correct bit size and type for the specific hammer and drilling conditions.

11. Are there different types of DTH bits for various drilling needs?

Yes, DTH bits come in various designs with different numbers of air passages, button shapes, and face designs to match specific rock conditions and drilling requirements.

12. How does the choice of DTH hammer and bit impact the overall drilling cost?

The efficiency and durability of DTH hammers and bits can significantly affect drilling speed and the frequency of replacements, thereby impacting the overall cost of drilling operations.