720 16 33000 About the book CoNteNt The book provides all aspects and detailed study of Engineering Drawing Plane and 1. Visible lines are drawn as solid thick lines.
Technical Drawing Standards Leader Lines
Leader lines should be inclined between 15 o to 75 o.
. For general engineering drawings the types of lines recommended by the Bureau of Indian Standards shown in table 2 must be used. Engineering Drawing An engineering drawing is a precise technical graphic model that communicates design intent. A leader line is a line referring to some form of feature that could be a dimension an object or an outline.
A drawing leader consists of an arrow and a text. Leader Hatching type lines must be drawn thin and continuous. Leaders are more thin lines used to point to an area of a drawing requiring a note for explanation.
C type Continuous THIN Freehand. Paperback with Four color Jacket Cover Pages. Avoid chain dimensioning especially for mechanical objects.
For More Engineering Drawing MCQ Click Here. The leader line should terminate in an arrowhead or dot. These are drawn may be vertical or inclined to indicate the height of the dimension figure.
Set the divider to a convenient length and mark off seven spaces on AC. Leader linea thin solid line used to indicate the feature with which a dimension note or symbol is associated- Leader lines are generally a straight line drawn at an angle that is neither horizontal nor vertical Leader lines are. They are uniformly spaced about 1 mm to 2 mm apart.
These lines are drawn to make the section evident. A leader line is a continuous straight line that extends at an angle from a note a dimension or other reference to a feature An arrowhead touches the feature at that end of the leader At the note end a horizontal bar 6 mm long terminates the leader approximately 3 mm away from mid-height of. Tolerance is the amount a particular dimension is allowed to vary.
A type B line thin continuous straight going from the instruction to the feature. In this way the leader will not be confused with other lines of the drawing. A leader is a thin line used to connect a dimension with a particular area figure 24.
170 mm 235 mm Binding. In drawings that do not have cutting planes visible lines will be the thickest lines drawn. Draw a line AC at any convenient acute angle with AB.
C Leader lines are used to direct an expression in note form to the intended place on the drawing. Draw lines through points 1 2 3. This line is used to represent the location of a cutting plane.
This line is used to show hidden edges of the main object. This line is used to represent the center line for circles and arcs. They are generally used as thin lines.
Following are the different types of lines used in engineering drawing. A type Continuos Thick. All of the above.
In technical drawings the standards of the leaders and arrows are very important. Plus and minus dimensioning is the allowable positive and negative variance from the dimension specified. If the reference is to a line the leader is always terminated at this line with an arrowhead as shown in.
But 30 o to 60 o is preferred. One end of the leader terminates either in an arrowhead or a dot. This line is located in front of cutting planes outlines of adjacent parts censorial Lines and to state center of gravity.
Leaders should have a uniform and consistent appearance at all drawings independently of the drawing scale. 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. 7 Thin chain line find its application as.
Join 7tothe point B. A leader line consists of two parts. The first dimension line should be approximately 12 mm 06 in from the object.
An extension line extends a line on the object to the dimension line. Divide a Line into number of equal parts 1. Related Questions on Engineering Drawing.
4 5 and 6. Leader line is drawn may be 30 or 60 to the bottom of dimensions. Leader lines and Termination of the dimension line.
You can see the general standards that are used generally below. Vi Leader Lines A leader or a pointer is a thin continuous line connecting a note or a dimension figure with the feature to which it applies. What are the types of line in drawing.
B Dimension lines show the direction and extent of dimension. Leader line is the thin solid line used to indicate the feature with which a dimension note or symbol is associated. Continuous thin line find its application in engineering drawing as Dimension line Projection line Leader line.
Last Updated on Wed 24 Nov 2021 Engineering Drawing. 2015 Reprint ISBN. Draw a straight line AB.
End of the extension line. They are preferably drawn at a 45 angles. It is used by.
Spot the beginning and end points. Draw the line firmly with a free and easy wrist-and-arm motion. Leader or Pointer Lines.
From this line the remainder of the leader is drawn at an angle dog leg to an arrowhead or dot. Uniform leaders can be easily achieved in modern CAD software using annotative. 7 Thin chain line find its application as.
More specifically the arrow size arrow inclination the text size allow line weight etc should all be the same for all leaders in a drawing. Swing the pencil back and forth between the points barely touching the paper until the direction is clearly established. B type Continuous THIN.
ENGINEERING DRAWING PLANE AND SOLID GE O M ETRY By N. Let the points obtained be l23456 and7. Continuous thin line find its application in engineering drawing as Dimension line Projection line Leader line.
Extension lines begin 15 mm from the object and extend 3 mm from the last dimension line. Hold the pencil naturally. Consider thin lines are 03 mm and thick lines 06 mm in technical drawing.
A Extension lines are used to indicate the extension of an edge or point to a location outside the part outline. These are thin continuous lines drawn from a dimension figure to the feature to which it refers.
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