Drill Bits For Metal-Carbide -Tipped Drill
A type of drill used in core drilling. The steel cylindrical bit body is named after the tungsten carbide cutting tools inlaid with tungsten carbide. The shape of carbide cutting tools and the number, arrangement and Angle of insert welding are called bottom edge, inside edge and outside edge to ensure the gap between water and powder discharge. The upper part of the bit body is connected with the core pipe by a screw, the side part of the bit body is provided with a water tank, and the bottom lip is also provided with a water mouth. The flume and nozzle are to ensure the flow of washing fluid, to eliminate rock powder and cool the bit. In order to increase the clearance when drilling clay and shale formations, ribs are welded on the inner and outer wall of hard alloy bit, which is called rib bit. Needle-like carbide self-grinding bits can be used in hard formations with high abrasives. General hard alloy bit drilling rock drillability of class ⅱ - ⅶ strata; Needle-like carbide bit can drill grade ⅵ ⅷ rock.