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
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… … IX X zi — zn Fig. 29. Conventional Drawings of Screw Threads. 16 MACHINE DRAWING to scale. The distance between lines is estimated and arranged to avoidcrowding so as to give a pleasing appearance. The lines may be at anangle with, or perpendicular to the axis of the screw. The angle whenused is…
Machinery
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