Geological Drill Rods We manufacture drill rods are crafted from quality heat treated materials ensuring superior wear resistance, strength, and toughness in the most demanding applications. Drill rods are available in DCDMA sizes AW, BW, NW and HW with tapered threaded tool joints in sizes AWY, BWY and NWY. Drill rods are also available in Wireline sizes A, B,N, H, P and Metric sizes 42mm, 50mm, 60mm, 7Omm and 90mm. We also manufacture Friction welded Drill Rods for other applications such as DTH Hammer rilling. Casing tubes are available in DCDMA sizes BW, NW, HW, PW and SW and Metric Sizes 46 -146 mm. Specifications: 1.Whole heat treatment 2.Screw thread heat treatment. 3.Hard chromed on pin end geological steel pipe-entire length thermal treatment, NC lathe with former cutters Material:30CrMnSiA or 45MnMoB(A grade), XJY850 or BG850( B grade)