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Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments. Elementary instruction in practical mechanical drawing. Together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers (1889)

Rose, Joshua · Philaelphia, H.C. Baird & co.; [etc., etc.] · leaf 115

An illustration from Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments. Elementary instruction in practical mechanical drawing. Together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers, 1889, leaf 115
g the width of the front flat of the head, as wellas the diameter of the stem. From the point wherethese arcs meet line 2, and with the same radius, arcs5 and 6 are marked, showing the widths of the other 8 MECHANICAL DRAWING SELF-TAUGHT. Mats of the head. The thickness of the head andthe length of… … Fig- i53- point A. In the United States standard for bolt headsand nuts the thickness of the head is made equal tothe diameter of the bolt. With the compasses set forthe arcs 3 and 4, we may in two steps, from A alongthe centre line, mark off the thickness of the head EXAMPLES IN BOLTS, NUTS, AND…

Mechanical drawing

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