Compton, Alfred G. (Alfred George), 1835-1913 · New York : J. Wiley & Sons · leaf 143
129 DRILLING AND SAWING. slips by the teetli of a toothed wheel which is at- tached to the axis, when the handle is turned in one direction, but catches the teeth and turns the drill when moved in the opposite direction. The hand-drilling machine, Fig. 71, is used for the same purpose, and is even… … Fig. 72. Setting the plate on the bottom of the frame- work of the drill, and supporting it on blocks, if necessary, to raise it to the proper height, turn the screw at the top till you bring the point of the
Metal-work
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