The machinist and tool maker's instructor, containing an easy method of calculating and laying out difficult work in the machine shop .. (1896)
Genung, Edward. [from old catalog] · New York [Press of J. B. Savage, Cleveland] · leaf 54
ry, and yet it is very simple, as I will show you, bythat process. Suppose we have a plate and want to turn a groove onone side of it just large enough so that eleven (11) balls, eachone-quarter {%) inch in diameter, will lie in the groove neatlyor just fill it. How large will it be? A great many… … 50 THE MACHINIST AND TOOL MAKERS INSTRUCTOR. inches, but this is a mistake, as a glance at the figure, whichis greatly enlarged, will show that the balls will touch only onthe line A C and not on the circle D E. In an example of this kind no drawing is necessary. Inany circle there are 360 degrees…
Machinery
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