Size Range: 6" - 26"

The milled tooth (steel tooth) roller cone drill bit is suitable for drilling in soft - to - medium - hard formations with good drillability. The tooth surface of the steel - tooth drill bit is welded with a new - type wear - resistant alloy, increasing the wear resistance of the cutting teeth. The outer row of the roller cone is inlaid with trimming teeth, the back of the roller and the back of the tooth holder are inlaid with cemented carbide teeth, and the tip and front side of the tooth holder are surfaced - welded with wear - resistant alloy, improving the drill bit's gauge - protection ability. High - precision - fit radial and rolling bearings, along with steel - ball locking, are used. The thrust - bearing surface is surfaced - welded with wear - resistant hard alloy and undergoes anti - friction treatment, enhancing the drill bit's ability to withstand axial loads and the anti - galling ability of the thrust surface. The bearing seal uses high - performance O - ring seals, the optimal seal compression, and an arc - shaped seal structure, effectively improving the bearing sealing performance. High - performance drill - bit - specific grease is applied.