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B19,B22,B25 rock drill tapered steel rods China Coal Group: Tapered drill rod, Drill rod for rock drilling machine,Integral drill rod B19 B22, 22mm diameter drill rod/drill pipe, Tapered drill rod, integrail drill rod, integral drill pipe, Hex mining rock drill steel rod, Light weight rock drilling rod, rock drilling pipe 2m, 4m coal mining rock drilling rod , rock drill tapered steel rods. zmwm01
This drill rod can be connected with button bits,taper bits,and cross-type bits.
Application:Tapered drill rods are used in granite and marble quarry, gold mine, railway, tunnel, etc. for drilling
Technical parameters
Model: B19,B22,B25
Model | Taper Degree | Drilling Road Length | Shank Size |
Hex.19mm | 7°,4.8°,12° | 0.4m-4.0m | 83mm,108mm |
Hex.22mm | 7°,4.8°,12° | 0.8m-6.0m | 83mm,108mm |
Hex.25mm | 7° | 0.8m-6.0m | 108mm,159mm |
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