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Extension drill rod |
（1）Thread: R22, R25, R28, R32, R38, T38, T45, T51,
（2）Rod size : hex.22mm, hex.25mm,hex.28mm, hex.32mm, hex.35mm, dia.39mm-52mm
（3）Length: 0.4m-6m,
（4）Package: in wooden case or in bundles
（5）Supply ability:10000pcs/month
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Extension drill rods are made by hollow drill steels; there are two shapes of extension rods, round type and hexagonal type. This hollow hole are usually named flushing hole, used for transmitting water or air during drilling，And the threads can be used for connecting couplings, shanks, couplings or bits.
Usually for extension rods, there are R22, R25, R28, R32, R38, T38, T45 ,T51,ST58, T60 threads, and different lengths of rods are available from 600mm to 6400mm usually
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| We are a professional manufacturer of extension drill rod in China. Our main products include extension drill rod ,drifter drill rod ,MF(male-felale)drill rod , speed drill rod ,button bit 、tapered button bit 、thread button bit 、retrac button bit 、cross bit 、chisel bit 、shank adapter 、coupling sleeve、tapered drill rod 、Hex drill rod、Integral drill rod、 coal mining bit 、Tunneling bit 、road planing picks 、conical picks 、crusher picks 、flats picks 、surface mining tools 、Trenching tools 、Foundation drilling tools 、Grader blades 、DTH bit 、DTH hammer 、DTH drill rod 、 self drilling anchor bolt 、self drilling anchor accessories 、Blast furnace tapping hole tools 、Roller cutter bit 、TBM cutter 、cutting tools which are used for mining, quarrying, tunneling, water well drilling, mineral exploration, geological prospecting, civil engineering and construction. Etc.
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