| Message: | General Introduction PDC coal mining roof bit are mainly used to drill the roof and side supporting hole, the gas drainage, water infusion, geological exploration hole and grouting hole and so on for the coal mine seam, water conservancy and hydro-power, dam and roadway construction of bolt-mesh support. The life of these bits is 10-30 times of alloy bits. Range of Applications 1. Blast hole drilling2. Exploration drilling3. Water injection drilling4. Gas detection and drainage5. Water detection and drainage6. Roof and side drilling and bolting Zuanlong adopt high quality cutters and advanced brazing technology, so the anchor shank drill bits have high impact resistance and stable performance, can be applied to rock formation of f |
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