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表镶式金刚石钻头钻进中硬岩层是借钻具的轴心压力，以其胎体唇面镶焊的金刚石之棱角切进岩石一定深度，并随钻具的迴转连续对岩石进行切削和剪切的作用来破碎岩石的。所以，钻头的质量，金刚石的品级，钻进工艺规程等，都直接影响钻头的使用寿命。在钻进工艺规程中，正确选择轴心压力对延长钻头的使用寿命，提高钻进效率，减少金刚石的磨损都是极为重要的。因此，必须分析轴心压力与寿命的关系。
Table inlaid diamond bit drilling hard rock is boring by drilling the core pressure, with its carcass lip welding diamond edge cut into the rock to a certain depth, and with the rotation of the drill to the rock continuous cutting and The role of shear to break the rocks. Therefore, the quality of the drill, diamond grade, drilling procedures, etc., have a direct impact on the life of the drill. In drilling procedures, the correct choice of axial pressure to extend the service life of the drill, improve drilling efficiency and reduce diamond wear are extremely important. Therefore, we must analyze the relationship between axial pressure and life.