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lines that are usually used in engineering
Typology: Study Guides, Projects, Research
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Technical drawing Lines are used for different purposes to provide specific information for designers, manufacturers, etc. looking at the drawing. The person who will read drawings have to learn what they mean. Line types are also a language type to communicate between technical people.
A; Continuous Thick Line: Surroundings and sides of the matters ( Outlines of the Edges), End of the Screws,
Mario Zavala/Demand Media
Object lines are solid heavy lines, .7 mm to .9 mm. These lines define the shape of the object portrayed and are the outermost outline of the object. A round bar is shown as a circle in one view and a rectangle in the other. Both would be drawn with object lines.
Mario Zavala/Demand Media
A center line is a .3 mm to .5 mm line that alternates between short and long dashes. It is used to identify a hole as shown from the side. If a hole were in a plate, the center line would locate the center in the view where the feature isn’t shown.
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Mario Zavala/Demand Media
A hidden line is a .3 mm to .5 mm dashed line. It shows features, such as holes, in a view they are not in. The feature will be shown in another view of the drawing.
Mario Zavala/Demand Media
A break line is a .3 mm to .5 mm or .7 mm to .9 mm line with “Z” breaks, for a flat object, and “S” breaks, for a round object. These are used to show that a portion of the part is not shown. The area left out will not have any features that are unique yet is the same as what is shown. An example would be a rod that is threaded on both ends. Break lines would be used to eliminate the section between the threaded sections to shorten the object.
