Quantcast Phantom Lines

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Figure 2-10.—Conventional break lines. SECTION LINES show surface in the section view imagined to be cut along the cutting plane. VIEWING-PLANE LINES locate the viewing position for removed partial views. PHANTOM   LINES   consist   of   long   dashes separated by pairs of short dashes (fig. 2-11). The long dashes may vary in length, depending on the size of the drawing. Phantom lines show alternate positions of related parts, adjacent positions of related parts, and Figure 2-11.—Phantom-line application. repeated detail. They also may show features such as bosses and lugs to delineate machining stock and blanking  developments,  piece  parts  in  jigs  and fixtures, and mold lines on drawings or formed metal parts. Phantom lines always start and end with long dashes. STITCH LINES show a sewing and stitching process. Two forms of stitch lines are approved for general use. The first is made of short thin dashes and spaces of equal lengths of approximately 0.016, and the second is made of dots spaced 0.12 inch apart. CHAIN LINES consist of thick, alternating long and short dashes. These lines show that a surface or surface zone is to receive additional treatment or considerations within limits specified on a drawing. 2-7

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