Barrows, F. W. (Frank Wilson), b. 1853 · New York, N.W. Henley Pub. Co. · leaf 203
icular about in makingscrews and nuts which are to fit together is the pitch.It wont do to make the screw with a pitch of ten threads 202 PATTERNMAKING. to the foot and the nut with nine and three-quarters or tenand one-half. Fig. 92 shows a worm for use with a worm-wheel. Thisworm might be moulded… … Fig. 92. accuracy of the thread depends in a great measure uponthe skill of the moulder. I think a great deal better jobmay be done in the way I shall describe. Make your pattern for worm with long ends, as shownin the figure, one end being of the largest diameter of worm.If you already have the…
Patternmaking
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