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ALPHABET OF LINES
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ALPHABET OF LINES
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The line conventions recommended by the American National Standards Institute (ANSI) are used in the following figures, together with illustrations showing its application.
ALPHABET OF LINES
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Example:
• Dark, heavy lines.• Show the outline and shape of an object.• Define features you can see in a particular
view.
ALPHABET OF LINES
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Example:
• Light, narrow, short, dashed lines.• Shows the outline of a feature that can not
be seen in a particular view.• Used to help clarify a feature, but can be
omitted if they clutter a drawing.
ALPHABET OF LINES
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Example
• Thin line usually drawn at a 45 degree angle.
• Indicates the material that has been cut through in a sectional view.
Section Line
ALPHABET OF LINES
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Example:
• Thin line consisting of long and short dashes.• Shows the center of holes, slots, paths of
rotation, and symmetrical objects.
ALPHABET OF LINES
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Example
• Dark, heavy lines.• Show the length, width, and height of the
features of an object.• Terminated with arrowheads at the end.
ALPHABET OF LINES
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Example
• Thick broken line that is terminated with short 90 degree arrowheads.
• Shows where a part is mentally cut in half to better see the interior detail.
ALPHABET OF LINES
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Example
• Thick wavy line.• Used to break the edge or surface of a part
for clarity of a hidden surface.
ALPHABET OF LINES
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Example
• Long, thin lines.• Used to show that the middle section of
an object has been removed so it can be drawn on a smaller piece of paper.
ALPHABET OF LINES
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Example
Thin lines made up of long dashes alternating with pairs of short dashes.Three purposes in drawings. 1. To show the alternate position of moving parts. 2. To show the relationship of parts that fit together. 3. To show repeated detail.
Phantom Lines
ALPHABET OF LINES
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Examples
ALPHABET OF LINES
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Example
ALPHABET OF LINES
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ALPHABET OF LINES
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![Unit 4 Alphabet of Lines.ppt [Read-Only]...Alphabet of lines. Object Lines • Line weight or thickness is varied to show relative importance – Help distinguish basic shape from](https://img.pdfslide.us/doc/110x75/61077f12fdbd373fc36cd93e/unit-4-alphabet-of-linesppt-read-only-alphabet-of-lines-object-lines-a.jpg)
