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Definition of drillstock in US English: drillstocknounˈdrilstäkˈdrilstäk The part of a drilling tool or machine that holds the bit. Example sentencesExamples - Between each drilling stage, however, when the drillstock of the rod-installing apparatus is disconnected from the rod to enable the addition of another section to the same, it is necessary to maintain the pressure in the tunnel by other means.
Definition of drillstock in US English: drillstocknounˈdrilstäk The part of a drilling tool or machine that holds the bit. Example sentencesExamples - Between each drilling stage, however, when the drillstock of the rod-installing apparatus is disconnected from the rod to enable the addition of another section to the same, it is necessary to maintain the pressure in the tunnel by other means.
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