SD8 305 Water Well DTH Drill Bit Suit Drill Rods 89 / 114 SD8 Shank
Big Diameter DTH Is Our Advantage
SD8-305 Water Well Drill Bit With High Quality Steel For Hard Rock And Medium Hard Rock, Matched With Drill Rod 89, Drill Rod 114
Matched hammer diameter(inch) | Bit diameter | Air Holes | Gauge | Front | Weight/KG | Bit shank | |
mm | inch | (Qty.×Dia.) | (Qty.×Dia.) | ||||
8” | 203 | 8 | 3 | 9*18 | 6*18+4*16 | 46 | DHD380/SD8/QL80 /Mission80 |
216 | 8 1/2 | 3 | 10*18 | 6*18+7*16 | 50 | ||
254 | 10 | 3 | 10*18 | 6*18+9*16 | 60 | ||
305 | 12 | 3 | 12*18 | 12*18+12*16 | 82 |