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Dimensioning

Lines used in Dimensioning

TermDefinition
Baseline Dimension A method of dimensioning in which several dimensions originate from a common surface, center line, or center plane.
Continue Dimension A method of dimensioning in which dimensions appear in a line from one feature to the next
Leader thin, solid line directing attention to a note or dimension and starting with an arrowhead or dot.
Extension Line is a thin, dark, solid line that extends from a point on the drawing to which a dimension refers
Dimension Line is a thin, dark, solid line terminated by an arrowhead, indicating the direction and extent of a dimension.
Dimension Text text using decimal-inch or metric values
Arrowhead dimension line and leader terminators
Diameter Dimension dimensions a circle
Radius Dimension dimensions an arc
Gap 1/16" should be left where extension line would join the object outline.
Dimension Text Height The ASME standard recommends a .12″(3mm) text height.
Dimension Line Spacing ASME standards recommend a minimum spacing of .375″(10mm) from a drawing feature to the first dimension line and a minimum spacing of .25″(6mm) between dimension lines.
Center mark are used to show and locate the centers of circular features.
Dimension A description of the size, shape ,or location of features on an object or structure.
Created by: lmsterner
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