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 764
s machine consists in a short hollow circular bracket, having a nut titted on its upper endfor the purpose of receiving a strong square-threaded screw, which carries the radial arm for the tool-tlide. The vertical motion of the drill is therefore not confined to the motion of the spindle in its… … the advantage of steadiness of 758 TOOLS. working in a bearing on the top of the radial arm immediately over the centre of the screw—motiosbeing communicated from it to the drill-spindle by means of bevel geer as in Mr. Whitworths machine.Tlie additional horizontal traversing motion of the spindle…
Mechanical engineering · Mechanics · Engineering
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