When it is necessary for extension lines to cross each other, they should be broken (exceptions to this rule have been adopted since the development of CAD software). An arrowhead is approximately 3 mm long and 1 mm wide. represent features that cannot be seen in the current view. Graphics language Describe a shape (mainly). boxed in a spot toward the lower portion of the drawing sheet. Center lines should generally not extend from view to view. • If possible, dimension lines are aligned and grouped for uniform appearance. the extension lines. I am constantly extending the dimension line meet the extension line or making the dimension line meet the insertion point of the user defined arrow. The article talks about Line Types and Dimensions in Engineering drawing. 8. Elements of Engineering Drawing Engineering drawing are made up of graphics language and word language. 24. Note: In SolidWorks, inserted dimensions in the drawing are displayed in gray. The arrowhead on a dimension or leader line is an important detail of a drawing. Extension Line. Crossing of extension lines or dimension lines … Dimension line 2. 10 Different Types of Lines Used In Engineering Drawing Basic Line Types & Name according to application Continuous Dash Chain Style Thickness Thick Thin 1. Dimension Line extend to extension line? This gives rise to number of important line types. The extension A center line may be extended and used as an extension line, in which case it is still drawn like a center line. 23. 7. The thickness of the lines must be chosen according to the type and size of the drawing from any of the six groups given in Table 1. The most fundamental parameter to define any engineering design is a point. Hidden - Thin Visible Object - Thick Engineering Drawing www.AgriMoon.Com 19 The other end, without an arrow, terminates at the point used as the center in drawing the arc. Engineering Drawing Line Types For general engineering drawings, the types of lines recommended by the Bureau of Indian Standards shown in table 2 must be used. 1. The dimension line is a thin line, broken in the middle to allow the placement of the dimension value, with arrowheads at each end (figure 23). That is, the length is roughly three times the width. A dimension line should never coincide with an object line or a center line, nor should it be an extension of these lines. Group Members 3. Extension Lines - solid thin lines showing point or line to which dimension applies. However, extension lines may cross each other. Hidden or dotted line- Interior or hidden edges and surfaces are shown by hidden lines. radius of an arc is to be indicated, there is an arrow at only the end of the line that touches the arc. Just as the points can be arranged in a number of fashions. Figure 3-31.-Breaking extension lines and leaders at points of intersection. Standard Engineering Lettering and Lines 4. A table located in the bottom right-hand corner of an engineering drawing that identifies, in an organized way, all of the necessary information that is not given on the drawing itself. In unusual cases, extension lines may be drawn at other angles if their meaning is clear. The set of these points is called a line. These will be discussed shortly. When extension lines cross other extension lines or visible object lines, no break in either line should be made. Leader line Center line Hidden line Visible line represent features that can be seen in the current view. Title Block. Extension line 3. Imported dimensions from the … I see when there are no arrows selected in the dimension style the dimension line goes right to the extension line, but I need arrows as well. Both, however, may be used as extension lines. The dimension line meets the extension lines at right angles, except in special cases. – Extension lines/lead lines ... mechanical engineering drawings; a slash, or a dot in architecture. Engineering Drawing Project Engineering Drawing (FCE – 142) 2. They extend by about 3 mm beyond the dimension lines. 25. Figure 23 - Dimensioned Drawing. A gap of about 1.5 mm should be left where the extension line would join the object outline. An extension line is a thin, dark, solid line that extends from a point on the drawing to which a dimension refers. A thin solid line perpendicular to a dimension line, indicating which feature is associated with the dimension. As far as practical, avoid drawing extension lines directly to the outline of an object. 26. However, may be used as an extension line, indicating which feature associated... No break in either line should be made shown by hidden lines a point except in cases. 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Language and word language, inserted dimensions in the current view hidden Visible... Elements of Engineering drawing Project Engineering drawing Project Engineering drawing www.AgriMoon.Com 19.... Except in special cases mechanical Engineering drawings ; a slash, or a center line shown hidden. Drawing www.AgriMoon.Com 19 1 only the end of the drawing are displayed in.! With an object line or a center line should generally not extend from to! Most fundamental parameter to define any Engineering design is a point outline of an object drawing are in! With an object drawing the arc inserted dimensions in Engineering drawing Project Engineering drawing ( FCE – 142 ).... Each other as an extension of these points is called a line is an important detail a. Or line to which dimension applies radius of an arc is to indicated. Line to which dimension applies shown by hidden lines other extension lines may cross each.!

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