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Tapered drill rod |
（1）Steel grade: 55SiMnMo，40SiMnCrNiMo, 95CrMo equivalent to SANDBAR 20 or C253,
（2）Shanksize:hex.22mm×108mm,hex.22mm×159mm,hex.22mm×80mmhex.25mm×108mm. hex.
（3）Taper:6°，7°，11°，12°，etc
（4）Length:0.5m-9m
（5）Package: in wooden case or in bundles.
（6）Supply ability:3000MT/month
（7）Delivery time :20days
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Tapered drill rod is used by a hand held drill machine in Underground mining and for small hole drilling, equipped with small power rock drills, like air leg rock drills, hand held rock drills, etc. It can reduces the expense of impact energy, improves the drilling speed and efficiency, also it can be used for drilling bore hole diameter from 25mm to 43mm usually. Regarding Integral drill steels，the quality of a steel material and a tungsten carbide is very important to get good drilling performance.
According to different application, different lengths are available from 500mm to 9500mm usually. |
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| Taper drill rod is used for rock drilling, blasting holes and other drilling works in the quarries, coal mines, traffic and other contractions. It works with taper drill bits and has different length for various applications, our taper drill rods come in a variety of taper angles, generally, the light duty rock drill usually use 7 taper or smaller taper angle, the heavy duty rock drill mainly use 11、12 taper angle. And the basic theory is that taper drill rods and taper drill bits must be in the same tapered degree. We provide tapered rods in a full range of shank configurations and steel hex diameters for hand-held pneumatic drilling needs. |
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