Mainly used to drill bolting support boreholes in coal mines, ensuring fast and highly efficient roadway excavations.
Roof bolt bits featuring high quality PDC as cutter, have high wear and impact resistance. The simultaneous erosion of the matrix and the PDC piece makes the bit self sharpening, improving the drilling efficiency. The advanced welding technology guarantees the high strength and long service life. The bits can be used in most formations, suitable for air drilling and water drilling operations, providing a high ratio of successful holes with correct and stable hole diameters, greatly reducing the waste of bolts.
● Selection (unit: mm)
Φ25, Φ27, Φ28, Φ30, Φ32, Φ36, Φ42
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