Machine drawing; a text and problem book for technical students and draftsmen (1921)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 26
ded thread is illustrated at VIII. Thisthread is often rolled in sheet metal, as for screw caps, electric fixtures,etc. For some purposes it is cast in a mold. 29. Pitch and Lead.—The pitch of a screw thread is the distance fromone thread point to the next, measured parallel to the axis. The lead… … Fig. 28. Forms of Screw Threads. 30. Conventional Representation of Screw Threads.—It is not oftennecessary to draw the helix representing a screw thread, as there are anumber of conventional representations in use designed to save time.These serve the purpose just as well as the true…
Machinery
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