1Cone gage surface is reinforce with carbide compacts 2Bit bearing is non-sealed roller bearing. 1.Suitable for medium to medium hard formation of high Crushing Resistanc (hard shale,sands,etc.) 2.Bit bearing is non-sealed roller bearing.3.Hardfacing is applied on the shirttail,and carbide inserts for gage protection are pressed into the head OD.4.Cone gage surface is reinforce with carbide ...
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