Down the hole drilling DTH bit pneumatic drilling bits for blast hole drilling
|Different name：||Pneumatic DTH bits/ air bits|
|Main application：||for mining/well drilling/quarry/rock drilling/ blast hole drilling|
|Core specification parameters：||DHD/SD/QL/MISSION/NUMA high air pressure DTH bits|
|Applications:||Widely used in mining, quarrying, exploration, water-well, geothermal, solar and construction/geotechnical drilling projects|
A down-the-hole drill, usually called DTH, is basically a jackhammer screwed on the bottom of a drill string. The DTH hammer with bit is one of the fastest ways to drill hard rock. Driving by compressed air, the DTH hammer transforms the inner energy into the kinetic energy of the piston, and the impact energy is transmitted to the bit in the form of stress wave for rock breaking. Meanwhile, the rotational torque rotates the DTH bit to cut rock into small cuttings and dust.
We offers a wide range of DTH bits suitable for a variety of DTH hammer. The DTH bits are usually classified into three types as below:
Low Air Pressure DTH bits: Diameter from 65mm to 200mm for CIR90/CIR110/CIR150/CIR170 hammer
Middle Air Pressure DTH bits: diameter from 64mm to 108mm for BR1/BR2/BR3 hammer
High Air Pressure DTH bits
Size: from 3.5 inch to 12 inch
As we have adequate stock of DHD shank DTH bits from 3.5 inch to 12 inch in stock, a quick delivery is available to meet urgent order.
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.
The all-around application bit face specifically for medium hard and homogeneous rock formations. Good hole deviation control and good flushing capacity.
|Head Shape||Head Diameter(mm)||Shank Length(mm)||Spline||Button Type||Button Size|
|DHD3.5||Flat Face||90||180||8||Spherical+Ballistic||6* Ø 14+ 5* Ø 12|
|Flat Face||95||180||8||Spherical+Ballistic||6* Ø 14+ 5* Ø 12|
|Flat Face||100||180||8||Spherical+Ballistic||6* Ø 14+ 6* Ø 12|
|Flat Face||108||180||8||Spherical+Ballistic||8* Ø 13+ 6* Ø 12|
|DHD340||Convex Face||108||209||8||Spherical+Ballistic||7* Ø 16+ 6* Ø 14|
|Convex Face||115||209||8||Spherical+Ballistic||7* Ø 16+ 6* Ø 14|
|Convex Face||127||209||8||Spherical+Ballistic||8* Ø 16+ 4* Ø 14+3* Ø 13|
|Convex Face||130||209||8||Spherical+Ballistic||8* Ø 16+ 4* Ø 14+3* Ø 13|
|DHD350||Convex Face||140||260||8||Spherical+Ballistic||7* Ø 18+ 4* Ø 15+3* Ø 14|
|Flat Face||146||260||8||Spherical+Ballistic||8* Ø 18+ 8* Ø 14|
|Flat Face||152||260||8||Spherical+Ballistic||8* Ø 18+ 8* Ø 14|
|Concave Face||165||260||8||Spherical||8* Ø 18+ 4* Ø 14+4* Ø 16|
|Concave Face||178||260||8||Spherical||8* Ø 18+ 6* Ø 16+5* Ø 14|
|DHD360||Concave Face||154||308.5||8||Domed||8* Ø 18+ 4* Ø 16+4* Ø 15|
|Flat Face||165||308.5||8||Domed||8* Ø 18+ 8* Ø 16|
|Concave Face||171||308.5||8||Domed||8* Ø 18+ 6* Ø 16+4* Ø 15|
|Concave Face||178||308.5||8||Domed||8* Ø 18+ 6* Ø 16+5* Ø 15|
|Concave Face||190||308.5||8||Domed||9* Ø 18+ 6* Ø 16+5* Ø 15|
|Concave Face||203||308.5||8||Domed||10* Ø 18+ 8* Ø 16+6* Ø 15|
|DHD380||Concave Face||203||350||10||Domed||10* Ø 18+ 4* Ø 18+10* Ø 16|
|Concave Face||216||350||10||Domed||10* Ø 18+ 4* Ø 18+10* Ø 16|
|Concave Face||230||350||10||Domed||12* Ø 18+ 12* Ø 18+6* Ø 16|
|Concave Face||235||350||10||Domed||12* Ø 18+ 12* Ø 18+6* Ø 16|
|Concave Face||254||350||10||Domed||12* Ø 18+ 12* Ø 18+8* Ø 16|
|Convex-Concave Face||275||350||10||Domed||12* Ø 18+27* Ø 16|
|Convex-Concave Face||305||350||10||Domed||15* Ø 18+35* Ø 16|
|DHD1120||Convex-Concave Face||305||490||8||Domed||15* Ø 20+27* Ø 18+8* Ø 16|
|Convex-Concave Face||311||490||8||Domed||15* Ø 20+27* Ø 18+8* Ø 16|
|Convex-Concave Face||325||490||8||Domed||15* Ø 20+27* Ø 18+8* Ø 16|
|Convex-Concave Face||350||490||8||Domed||16* Ø 20+32* Ø 18+13* Ø 16|
|Convex-Concave Face||381||490||8||Domed||16* Ø 20+36* Ø 18+18* Ø 16|
|Convex-Concave Face||400||490||88||Domed||16* Ø 20+40* Ø 18+28* Ø 16|
|Convex-Concave Face||445||490||Domed||20* Ø 20+48* Ø 18+25* Ø 16|
|Convex-Concave Face||500||490||8||Domed||24* Ø 20+90* Ø 18|
|Place of Origin:||Made in China|
|Model Number:||DHD/SD/QL/MISSION/NUMA 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|
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.
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