Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 320
Fig. 074. MACHINE DESIGN AND MECHANICAL CONSTRUCTIONS. There is considerable variation in the proportion of teeth, as—Thickness of teeth, from -45 to -48 pitch.Space between teeth, from -55 to *52 pitch. 303 … Height of teeth outside pitch circle, from -2 to -3 pitch. Depth of teeth inside pitch circle, from -3 to 4 pitch. The above is for cast teeth, used without finishing ; the teeth are madenarrower than the space, and the height less than the depth on account of theirregularities of a rough casting.…
Mechanical drawing
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