Used in hard rock drilling with high wear resistance 5'' DTH drill hammer mining tools:

Bit Shank: IR(DHD)350/ SD5 / QL50 / M50 / WK50 / COP54

In order to increase working life of the pision case when drilling very abrasive rocks, the driver sub is designed to be made up of three pieces and only the wear-proof casing need to be replaced timely.

Heat treated piston and internal cylinder guiding system are reasonably structured to achieve the highest efficiency and the largest impacting power. The penetration speed is 10%-30% faster than other products of the same type.

TND optimized structure design: Fewer air hole the s on internal cylinder, higher stiffness of air slot.

The multiple threads are CNC machined to achieve high accuracy, making the bit easy and smooth to get assembled. Driver sub is heat treated to achieve better abrasiveness and longer life.

TND Hammer consists of:
Top Sub: 2 3/8 API RGE ; O-ring ; Check Valve Dart ; Spring ; Steel Washer ; Rigid Valve ; O-ring ; Internal Cylinder ; Piston ; Piston case ; Bit Retainer Ring ; O-ring ; Drive Sub.