Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 212
ntoone of a set of two wheels wliich turn together, and are placed on a fixed pivot, independent of theboring-bar. The upper wheel of this set geers into the upper wheel a, which is keyed to the boring- LATHE. 205 bar. and of course turns -with it. The amount of feed, or the advance of the… … The geering shown above the top of the boring-bar is for hoisting up the boriDg-bar, when the ma-chine is to be used for planing a flat, or tiaming a cylindrical or conical surface. The machine, aaarranged for this purpose, is shown in Fig. 2552.
Mechanical engineering
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