Air-Driven Hollow DTH Hammer

Used together with dual concentric drill pipe, air-driven hollow down-the-hole hammer can perform continuous reverse circulation core (sample) drilling and other drilling technology. It is suitable for geological exploration core drilling, well drilling, engineering drilling in hard or complicated formations and it has advantages of high drilling efficiency, long life of bit, high quality of drilling hole and core.Features: 1) Types: CQ80, 89, 100, 108, 127, 146, 160, 200 2) Other specifications are available as per your request