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This method of representing a three-dimensional object in two dimensions using different views is called orthographic projection.
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They have arrowheads at each end where they touch extension lines. A dimension is listed toshow feature size. They are thin and have arrowheads at their ends.
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They are angled with an arrowhead at one end that touches a part feature. A dimension or note isplaced at the other end of the leader. They are thin and continuous
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Extend edges for dimensioning purposes. They are thin and continuous.
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Show part edges that cannot be seen in a given view. They are thin and broken into smalldashes.
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It is the size of an actual object related to its size drawn on a print.
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A technique used to represent three-dimensional objects on a two-dimensional surface.
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It is created by projecting the right side of an object onto the right surface of the “glass box,”.
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Engineering drawings are made up of different styles of lines called line types. Each line type is usedfor a specific purpose. They are identified by the differences in their appearances.
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Sometimes the views created through orthographic projection do not clearly show the shape ofcomplex parts. To provide a better visualization of the part, a drawing may contain a three-dimensional view.
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They are used to show part edges that are visible in a given view. They are thick and continuous.
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Show the sizes and shapes of components and their specific features, such as holes, slots, or surfaces.
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Show the center of a diameter of radius, or the center of a part. Hole locations are shown where twocenter lines cross. They are thin and broken into alternating long and short dashes.
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They show surfaces that have been “cut” in a section view created by a cutting plane line. Theyare thin and angled.
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They are used to show alternate positions of parts or outlines of adjacent parts. They are thinand have one long and two short dashes alternately spaced.
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Includes information such as the part name and number, tolerances, scale, material that the partshould be made from, and any required heat treatment.
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They are used to make an imaginary cut through an object. The arrowheads indicate the viewingdirection of the section view after the cut. They are thick and have one long and two short dashesalternately spaced.
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It is the view that normally shows the most details. The person creating the drawing decides which view will be the front view.
