Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 211
204 LATHE. in B and E, Fig. 2551, and turns -with it. The boring-head ■which holds the cutters is shown at G, and i«connected with two screws nearly the whole length of boring-bar, set in grooves and moving with the barand shown by dotted lines, which screws regulate the descent or feed, as it is… … On the upper end of the boring-bar shown at a, Fig. 2552, is placed the geer by which the proper mo-tion is given to the feeding-screws. On the end of each feeding-screw is placed a small pinion, wliichseers into the inner teeth of a wheel which is loose on the top of boring-bar, and of course does…
Mechanical engineering
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