الوصف

DM series is specially designed for coal mining, which is mainly used to make anchor-shank drill bits. It is economical and durable, having high rate of penetration and great efficiency. DMP series is designed for shallow stratum drilling. Compared with DM series, the abrasion resistance has an increase of *0%. At the same time, the interface of shallow slots, which are symmetrical and radial, improves distribution of stress and increases reliability and life of PDC cutter.