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Page Title: DETAIL DRAWINGS
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DETAIL DRAWINGS

A detail drawing is a print that shows a single component or part. It includes a complete and exact description of the part's shape and dimensions, and how it is made. A complete detail drawing will show in a direct and simple manner the shape, exact size, type of material, finish for each part, tolerance, necessary shop operations, number of parts required, and so forth. A detail drawing is not the same as a

Figure 3-24.-An exploded view.

 

Figure 3-25.-Detailed drawing of a clevis.

detail view. A detail view shows part of a drawing in the same plane and in the same arrangement, but in greater detail to a larger scale than in the principal view.

Figure 3-25 shows a relatively simple detail drawing of a clevis. Study the figure closely and apply the principles for reading two-view orthographic drawings discussed earlier in this chapter. The dimensions on the detail drawing in figure 3-25 are conventional, except for the four toleranced dimensions given. In the top view, on the right end of the part, is a hole requiring a diameter of 0.3125 +0.0005, but no - (minus). This means that the diameter of the hole can be no less than 0.3125, but as large as 0.3130. In the bottom view, on the left end of the part, there is a diameter of 0.665 0.001. This means the diameter can be a minimum of 0.664, and a maximum of 0.666. The other two toleranced dimension given are at the left of the bottom view. Figure 3-26 is an isometric view of the clevis shown in figure 3-25.

Figure 3-26.-Isometric drawing of a clevis.

 

Figure 3-27 is an isometric drawing of the base pivot shown orthographically in figure 3-28. You may think the drawing is complicated, but it really is not. It does, however, have more symbols and abbreviations than this book has shown you so far.

Various views and section drawings are often necessary in machine drawings because of complicated parts or components. It is almost impossible to read the multiple hidden lines necessary to show the object in a regular orthographic print. For this reason machine drawings have one more view that shows the interior of the object by cutting away a portion of the part. You can see this procedure in the upper portion of the view on the left of figure 3-28.

Figure 3-27.-Isometric drawing of a base pivot.

 

Figure 3-28.-Detail drawing of a base pivot.

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