Bq H5 Impregnated Core Drill Bits for Tunnel Drilling

Bq H5 Impregnated Core Drill Bits for Tunnel Drilling. Extended Lifespan: 15mm standard crown height increases lifespan significantly, reducing replacement frequency by 2-3 times. Optimized Water Flow: Evenly spaced water outlets with curved channels reduce resistance and prevent overheating. Multi-Hardness Coverage: Six matrix series (H3-H13) cover soft to extremely hard rock strata without switching bits. Customizable Crown Height: Crown height is customizable to meet specific drilling requirements. Customizable Water Outlets: Water outlet configuration is customizable for optimized drainage efficiency. Wide Size Compatibility: Available in Wireline, T, TT, T6, B, MLC, LTK, WF, TW, WT, WG, WM, and Chinese standard sizes. Fast Standard Delivery: Standard orders ship within 3-7 working days; urgent orders shipped within 3 days. Custom Label & Logo: Custom labels and logos available; fee waived for orders of 200 pieces or more.