With this in mind, what is the meaning of the extension line? Extension lines on a drawing are fine, dark, solid lines that extend outward from a point on a drawing to which a dimension refers. Extension lines provide a means of displaying a measurement without placing the dimension on.
Improving Engineering Drawing 8 Principles and Tips
They are terminated by arrowheads touching the outlines, extension lines or centre lines.
What is extension line in engineering drawing?
The extension lines for dimensioning should run from the outlines without leaving a gap and extend beyond the dimension lines. This type is also used to draw outlines of adjacent and revolved sections. Dimension lines and extension lines extension (or projection) lines are used to indicate the extremities of a dimension. The dimension line has two arrowheads between the extension lines and the measurement on top (or inside, like in the image above) the line.
In machine drawing, all unit marks should be omitted, except when necessary for clarity;
Normally, the dimension line intersects the extension line at right angles. An extension line extends a line on the object to the dimension line. They are generally drawn up to 1 mm from the outline of the object. (a) extension lines are used to indicate the extension of an edge.
Extension lines continue or extend from the […]
For example, in a drawing, you can use projection lines on an auxiliary view to enable creation of additional views with proper alignment and size. It extends by about 3 mm beyond the dimension line. Usually, the dimension line meets the extension line at right angles. Extension lines are solid and thin lines like dimension lines.
Extension lines on a drawing are fine, dark, solid lines that extend outward from a point on a drawing to which a dimension refers.
For example, 1 reamer or 1mm drill. Usually, the dimension line meets the extension line at right angles. Extension lines continue or extend from the surface of the object and establish the size of the dimension. A leader line is a line referring to some form of feature that could be a dimension, an object or an outline.
Extension lines are auxiliary lines to show which entity of the part or product is dimensioned with dimension lines and dimension values.
They’re drawn perpendicularly when connecting dimension traces. Extension traces normally join dimension traces to completely different options on elements and pictures on the web page. A leader line consists of two parts. The dimension line meets the extension lines at right angles, except in special cases.
They have one or more arrowheads.
They do not touch the object lines and extend slightly past the dimension line. The lines are defined as follows: Dimensions are usually placed between extension lines. Extension lines (1) types of lines.
What is the thickness of extension line?
Detail dimensions should line up in chain fashion. What is extension line in engineering drawing? A gap of about 1.5 mm should be left where the extension line would join the object outline. A hidden line, also known as a hidden object line is a medium weight line, made of short dashes about 1/8” long with 1/16”gaps, to show edges, surfaces and corners which cannot be seen.
There should be a gap of about 1 / 16″ where the extension line would meet the outline of the object, and the extension line.
The extension on the drawing is a thin, dark, solid line that extends outward from the point on the drawing that the dimension refers to. Dimensions may be positioned on a drawing by using either the unidirectional or the aligned. What is projection lines in engineering drawing? A type b line (thin, continuous, straight) going from the instruction to the feature.
Longer dimensions should be placed outside all intermediate dimensions so that dimension lines will not cross extension lines.
Extension lines annotate what is being measured. Dimension lines are used to label a particular dimension. They are drawn for constructing figures. The definition to an extension line is:a line used to visually connect the ends of a dimension line to the relevant feature on the part.how extension lines are used.
This can be a dot if the line ends within the outline of the part, an arrow if the line.
The general standard requirements of dimension lines are like that. Extension lines in technical drawings. An engineering drawing is a type of technical drawing that is used to convey information about an object. An extension line is a thin, dark, solid line that extends from a point on the drawing to which a dimension refers.
Projection lines are extensions of lines that assist in 2d drawing.
(lecture in hindi) in this video, you can learn in deep about how to use dimension line, extension line, and leader command in engineering drawings.1.) dimen. Projection of a line kept inclined to hp and parallel to vp
