This paper analyses that tip Angle of drill bit influences on cutting capability and life of twist drill, when the material and shape of work piece is different.

分析了工件材料、形状不同时，钻尖顶角的大小对麻花钻切削性能及寿命的影响，介绍了麻花钻的钻尖顶角的选择。

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Using Linux-based servers working in parallel, they generate a computer model of how a drill bit must twist and turn to hit one or more formations as much as 9, 000 meters below the sea floor.

FORBES: The delicate art of sucking up