... 527,537,547 (HJ or HA)KN/mm 0.5~1.20R/min 100~50Applicable Formations/layer ... features)Button bit,saw teeth1) Y-Conical teeth 2) X-chisel teeth3)K- wide teeth4)G- Gague ... daysMarketCanada, USA, Middle east ,Africa, EuropeApplicationPetroleum & gas ,water well ,mining and tectonic industries ,oil field, construction, geothermal ... sealing for bearing durability. 3 1/2"-26" Kingdream water well reamer bit