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 Apply correct dimensioning procedures  Learn the technique of dimensioning  Understand the different line types and techniques used to show dimensions.

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Presentation on theme: " Apply correct dimensioning procedures  Learn the technique of dimensioning  Understand the different line types and techniques used to show dimensions."— Presentation transcript:

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2  Apply correct dimensioning procedures

3  Learn the technique of dimensioning  Understand the different line types and techniques used to show dimensions  Learn the placement of dimensions  Can you pick the most logical and practical place to put dimensions with respect to an object?  Learn the choice of dimensions  Which dimensions should you show and which ones should you not show?

4  The numerical value that defines the size, shape, location, surface texture, or geometric characteristic of a feature.

5  Thin, black line (0.5mm graphite)  Ends with an arrowhead  Arrowhead indicates direction and length of a dimension  Gap for dimension is usually near the middle  Distance from the object line is 3/8”  Distance away from other dimension lines is ¼”

6  Thin, black line (0.5mm graphite)  Extends from the point on the drawing that the dimension refers to  Drawn at right angles to dimension lines  Distance (gap) from object line before the extension line starts is 1/16”  Distance that the line extends past the last arrow is 1/8”

7  Drawn free hand  Uniform in size and style  Do not vary according to size of drawing or length of dimension  3 times as long as they are wide  1/8” long  Narrow and solid

8  Typically centered on the dimension line  If dimensions are right above one another they are staggered  1/8” tall  Fractions are a ¼” tall

9 Dimension refers to the number Largest dimension to the outside. Extension lines may cross Leave enough room between object and dimension lines.

10  Dimensions should be placed outside the drawing whenever possible  Extension lines should not cross dimension lines

11  Stagger the dimension text on parallel dimensions

12  Unidirectional: All dimensions are horizontal  Aligned: Dimensions are parallel to object lines

13  Each feature of an object is only dimensioned once  Dimensions should be placed in the most descriptive view of the feature  Dimension lines should be aligned and grouped when possible


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