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 45
40 THE MACHINIST AND TOOL MAKERS INSTRUCTOR. … Figure 32 is also a polygon of ten sides, generally called a decagon. Example: We want to mill a piece 2J^// across the flat side (the short diameter).How large a piece of roundstock will be required tomake it ? Multiply the se-cant of 18° = 1.051+ by theflat diameter required; thus?if we want it…
Machinery
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