Methods of machine shop work : for apprentices and students in technical and trade schools (1914)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York : McGraw-Hill · leaf 230
eventingtheir crawling sidewise, which they have a tendency to do. Ahole is therefore drilled somewhat smaller than the final sizeand is then enlarged by a boring tool constructed on theprinciple of Fig. 205. The action is precisely the same as thatof a lathe boring tool except that the tool,… … Fig. 205.—Revolving boring tool. in one application in Figs. 206-208. Holes are required spacedas in Fig. 206. It is easy to calculate and to make three discsof diameters such that, located concentrically with the desiredholes, they will be mutually tangent to one another as shownin Fig. 207. The…
Machine-shop practice
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