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 180
braces anddrill tools, is a socket having at theone end a square hole to receive thedrills, and at the opposite, a square*ang 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. and 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 · Mechanics · Engineering
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