1. Linear, Aligned, diameter, radius, Angular and
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AutoCAD
Lecture (15)
Dimensions
Linear, Aligned, diameter, radius, Angular and
Style Manager
Issued by: Ms.c. Ameer Mosa Thoeny

2. Working with Dimensions:
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Working with Dimensions:
Dimensioning is usually done after you complete all or most of a drawing.
The elements of a dimension:

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Linear Dimensions:
Use linear dimensions for lines, a straight segment of a polyline, or a straight segment in a block.
You can also use a linear dimension for arcs and circles
Specifying the linear dimensioned object
To dimension a line, choose Linear Dimension from the Dimension toolbar or
from standard bar- dimensions – linear.
The command syntax for copy is as follows:
Command: dimlinear
Specify first extension line origin or <select object>: pick
Specify second extension line origin: pick
Specify dimension line location or [Mtext/Text/Angle/Horizontal/Vertical/Rotated]: pick
Dimension text =

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Aligned Dimensions:
When you want to dimension a linear object that is not orthogonal
Specifying the Aligned dimensioned object
To dimension a non orthogonal line, choose Aligned Dimension from the
Dimension toolbar or from standard bar- dimensions – Aligned.
The command syntax for copy is as follows:
Command: dimaligned
Specify first extension line origin or <select object>: pick
Specify second extension line origin: pick
Specify dimension line location or[Mtext/Text/Angle]: pick
Dimension text = 21

5. Dimensioning Arcs and Circles
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Dimensioning Arcs and Circles
diameter dimensions.
Radius dimensions.
Marking arc and circle centers.
Angular dimensions

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diameter dimensions
When you want to dimension of an arc or circle objects, use an diameter dimension.
Specifying the circle diameter dimension
To dimension a circle diameter, choose diameter Dimension from the Dimension toolbar or from standard bar- dimensions – diameter.
The command syntax for copy is as follows:
Command: dimdiameter
Select arc or circle: pick
Dimension text = 8

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Radius dimensions
When you want to dimension of an arc or circle objects, use a radius dimension. .
Specifying the circle radius dimension
To dimension a circle radius, choose radius Dimension from the Dimension toolbar or from standard bar- dimensions – radius.
The command syntax for copy is as follows:
Command: dimradius
Select arc or circle: pick
Dimension text = 4

8. Marking arc and circle centers
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Marking arc and circle centers
Circle and arc centers are often marked in mechanical drawings because the center is an important aspect.
Specifying the Center Mark dimensioned object
To dimension a center mark, choose center Mark Dimension from the Dimension toolbar or from standard bar- dimensions – center Mark.
The command syntax for copy is as follows:
Command: dimcenter
Select arc or circle: pick

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Angular dimensions
When you want to dimension of an arc or angle objects, use an angular dimension.
Specifying the Angular dimension
To dimension a angel or arc, choose angular Dimension from the Dimension toolbar or from standard bar- dimensions – angular.
The command syntax for copy is as follows:
Command: dimangular
Select arc, circle, line, or <specify vertex>: pick
Specify dimension arc line location or [Mtext/Text/Angle]: pick
Dimension text = 136 9

10. Understanding Dimension Styles
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Understanding Dimension Styles
You should create your dimension styles before dimensioning.
To create a dimension style, choose Dimension Style from the Dimension toolbar to open the Dimension Style Manager, or from standard bar- dimensions – style.

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To create a new style, click New to open the Create New Dimension Style dialog box.

12. Then specify the wanted parameters as below:
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Then specify the wanted parameters as below:

13. Changing line type done from properties bar.
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NOTE:
Changing line type done from properties bar.
hange precision then, right click on dimension –precision -0
As shown below: