Practical engineering drawing and third angle projection, for students in scientific, technical and manual training schools and for ... draughtsmen .. (1897)
Willson, Frederick Newton, 1855-1939 · Princeton, N.J., The author · leaf 158
one-fourth Ci, will give the centre sof the outline hij. Draw the circle of centres throughs, from centre C. Then with s i in thedividers, and from centre / find q, whichuse in turn for arc g f e, and so continue.The loidth of rim, v to, is often made,by a shop rule, equal to three-fourthsthe… … Pitch (P) = bi = flDepth, Mv, = ,7PWorking Depth, Mz,=|.6P Addendum, M N, = .3 (? Width of Tooth, fi,=-nWidth of Space, i\r^,BacUlashrnClearance, zv,= io the number of teeth per inch of pitch-circle diameter.308) a central helix acfm..T, as follows: Divide a a,— 178 THEORETICAL AND PRACTICAL…
Mechanical drawing · Lettering
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