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All drilling machines are characterized by a rotating cutting tool which advances along its axis into a stationary workpiece producing a hole. Six common operations which can be performed on a drill press are drilling, reaming, boring, counterboring, countersinking, and tapping. Drilling machine capacity is determined by the size of the largest workpiece over which the spindle can be centered, the maximum clearance under the spindle, and the maximum drill diameter which can be fed at a practical feed rate through mild