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Engineering
Graphics
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INDEX
Introduction
Scales
Engineering Curves
Orthographic Projection
Isometric Projection
Projection of Points & Lines
Projection of Planes
Projection of Solids
Section of Solids
IN CLASS
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INTRODUCTIONTypes of Lines
Numbering
Dimensioning
Types of Polygon
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TYPES OF LINESTYPE ILLUSTRATION APPLICATION
CONTINUOUS THICK Visible outlines
CONTINUOUS THIN Dimension lines, Leader
lines, extension lines
CONTINUOUS THIN - WAVY Irregular boundary lines
SHORT DASHES Hidden outlines & edges
LONG CHAIN THIN Center lines, locus lines,
pitch circles
LONG CHAIN LINE
THICK AT ENDS
THIN ELSEWHERE
Cutting plane lines
LONG CHAIN THICK To indicate surface to
receive additional treatment
RULED LINE & SHORT ZIG-
ZAG THINLong break lines
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NUMBERING
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STRAIGHT LETTERS & NUMERALS
Step-1
First draw two horizontal lines of any length at the distance 10 mmapart from each other.
Step-2
Then draw vertical lines between the two horizontal lines atdistance 10 mm apart form each other.
Step-3
Then write down the Capital Alphabet letters within each box insuch a way that each letter of the alphabet should touch the
boundary of the respective box only. Like in the same way writedown full ABCD.
Step-4
As per the procedure described above write down numerals from 1to 0 in a new line.
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INCLINED LETTERS & NUMERALS
Step-1
First draw two horizontal lines of any length at the distance 10 mmapart from each other.
Step-2
Then draw vertical lines between the two horizontal lines such thateach vertical line should be inclined at an angle of 75 with thehorizontal line & each line should be at the distance of 10 mmapart from each other.
Step-3
Then write down the Capital Alphabet letters within each box in
such a way that each letter of the alphabet should touch theboundary of the respective box only. Like in the same way writedown full ABCD.
Step-4
As per the procedure described above write down numerals from 1to 0 in a new line.
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DIMENSIONING
There are two types of dimensioning system:
Uni-Directional System
Aligned System
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In Unidirectional Method of Dimensioning the dimension line
should be cut at center and dimensions should be placed in
the middle of dimension lines as shown into the figure.
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In Aligned Method of Dimensioning the dimension line should
be continuous and dimensions should be placed in the middle
of dimension lines as shown into the figure
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Polygon
30A B
C
4
6
BASIC DRAWING
TRIANGLE
SQUARE
PENTAGON
HEXAGON
SEPTAGON
OCTAGON
How to draw a
Polygon?
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30A B
C
4
6
TRIANGLE
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30A B
C
4
6
PENTAGON
BISECTOR
RADIUS
5
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30A B
C
4
6
HEXAGON
RADIUS
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30A B
C
4
6
OCTAGON
8
RADIUS
Anurag R Pal, PIT
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