Essentials of drafting; a text and problem book for apprentice, trade and evening technical schools (1918)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 61
a single helical projection (Fig. 90). The pitch is the distancefrom one thread point to the next thread point. The lead is the 44 ESSENTIALS OF DRAFTING distance which the screw will advance for one turn. When alarge pitch is required on a small diameter, the arrangement ofFig. 91 would weaken the… … Fig. 96 F/g. 99
Mechanical drawing
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