Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 178
nd the square hole in the key /■, are each taper, for more ready application; and thedrills are of the most simple kind, namely, lengths of wire pointed at each end, as in Fig. 545. The sketch, Fig. 544, is also intended to explain another useful application of this drill-stock, as an up-right or… … .--^3= 176 BORING TOOLS. Holes that are too large to be drilled solely by the breast-drill and drill-bow, are frequently com-menced with those useful instruments, and are then enlarged by means of the hand-brace, which is verysimilar to that used in carpentry, except that it is more commonly made…
Mechanical engineering · Mechanics · Engineering
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