chinacoal13
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
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 |