Dimension lines are thin and are used to show the actual size of an object. There are arrowheads at both end that terminate at the extension lines. Extension lines are also thin lines, showing the limits of dimensions.
Can extension lines be used as dimension lines?
Dimensions applying to two adjacent views should be placed between views, unless clearness is promoted by placing them outside. Longer dimensions should be placed outside all intermediate dimensions, so that dimension lines will not cross extension lines.
What is an dimension line?
The dimension line is a fine, dark, solid line with arrowheads on each end. It indicates direction and extent of a dimension. In machine sketches and drawings, in which fractions and decimals are used for dimensions, the dimension line is usually broken near the middle to provide open space for the dimension numerals.
What type of lines are dimension lines?
Dimension Line: Dimension line is a continuous thin line. it is indicated by arrowheads, it is drawn parallel to the surface whose length must be indicated. Projection or Extension Line: A projection line or extension line, it is a thin line. It is drawn perpendicular to the surface which is to be dimensioned.
What four lines are used to aid in dimensioning?
The basic types of dimensioning are linear, radial, angular, ordinate, and arc length.
What is the purpose of extension lines?
Extension lines continue or extend from the surface of the object and establish the size of the dimension. They do not touch the object lines and extend slightly past the dimension line. Extension lines provide a means of displaying a measurement without placing the dimension on the part.
Is it okay to dimension hidden lines?
Dimensioning to hidden lines should be avoided wherever possible. Dimensions should not be placed on a view unless clarity is promoted and long extension lines are avoided. 9. Longer dimensions should be placed outside all intermediate dimensions so that dimension lines will not cross extension lines.
What are the uses of extension lines?
Which line is thickest?
The direction of the cutting line is shown with a line called a cutting plane lineHeavy dashed line that shows a theoretical cut through an object.. This is the thickest line that may appear on a drawing.
Is there a way to show dimension lines?
To show hidden lines, right-click the dimension or a visible line and select Show Dimension Lines or Show Extension Lines. You can set individual extension lines to display as centerline style. This lets you identify when an extension line extends from a hole.
When do you use an extension line in drawing?
Extension Lines and Dimension Lines. Extension lines usually connect dimension lines to different features on parts and images on the page. They are drawn perpendicularly when connecting dimension lines. For example, an extension line will reach beyond a complex object to connect with a dimension line that may give a specific height or distance.
What are the different types of dimension lines?
Constructions line: A construction line is a thin line drawn to indicate the dimension line. The construction line is extended slightly beyond the point intersection. Arrowheads: Arrowheads are used to indicate the dimension line. Usually, the arrowhead must include angles of a minimum of 15°.
How to move dimension extension lines in sketch?
Move dimension extension line endpoints to other vertices or sketch entities in drawings by single-clicking, moving the mouse to the target location, and clicking again.Use the quick snap options available when you select and then right-click a dimension extension line endpoint to move extension lines to other vertices or sketch entities.
