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 

Shank: DHD/SD/QL/MISSION/NUMA 

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. 

Concave Bit 

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

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.

warranty:

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