Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 182
braces anddrill tools, is a socket having at theone end a square hole to receive thedrills, and at the opposite, a squaretang to fit the brace; by this con-trivance the length of the drill can betemporarily extended for reaching deeply-seated holes. The sockets are made of various lengths,… … 178 BORING TOOLS. nnd the resistance to end-long pressure much diminished, therefore the sockets should have a bulkproportionate to their length. The French brace, Fig. 521, is also constructed in iron, with a pair of equal bevel-pinions, and a left-hand centre-screw like the tools, Figs. 549, 550,…
Mechanical engineering
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