This document discusses orthographic projection and provides examples of drawing orthographic views from isometric views using first and third angle projection methods. It includes an isometric view of an object with its corresponding front, top, and right side orthographic views drawn to scale with dimensions. The document also provides step-by-step instructions for drawing orthographic projections of additional example objects from their isometric views using different projection methods.

1. Orthographic Projection
Prepared by:
Hemdeep Bhavsar

2. X
Y X
Fig 2(b)
P.P
H
D
R.H.S.V.
Z2
V.P
L
F.V.
H.P
T.V.
Z2
Fig 2(a)
L
D
H
X
Y
Y Y

164. Note : Ist angle means, the block is assumed in
front of V.P, above H.P and inside P.P,
as in fig. 2(b) where the F.V. is
projected on V.P, seen in X direction,
T.V. is projected on H.P, seen in Y
direction & R.H.S.V. is projected on
P.P, seen in Z2 direction

165. Fig. 2(c) shows turning of the planes H.P & P.P with
their respective hinges, considering plane V.P as
fixed plane.
It may be noted that :-
a) F.V. (X directional view) is on V.P, T.V. (Y
directional view) is on H.P, while R.H.S.V (Z2
directional view) is on P.P
b) F.V is within L & H, T.V is within L & D, While
R.H.S.V is within H & D.
c) The symbol for Ist
angle method of projections is
placed as shown on fig. 2(c)

166. D
Fig. 2(c)
H.P
F.V.
L
T.V.
V.P
X Y
R.H.S.V.
P.
P
H

167. Step by step procedure
Suggested to prepare
Orthographic views (First angle
method) for The simple
component Shown pictorially in
figure

168. 20 20 40
100
20
80
20
60
R4
0
Ø40
IISSOOMMEETTRRIICC
VVIIEEWW XX

169. R40
20 20
RR..HH..SS..VV 20
FFRROONNTT VVIIEEWW
100
80
ø40
80
20
TTOOPP VVIIEEWW
SSYYMMBBOOLL IISS
NNOOTT MMAARRKKEEDD
SSCCAALLEE:: 11::11
R20

170. FIGURE SHOWS ISOMETRIC VIEW OF A
SIMPLE OBJECT(WITHOUT DIMENSIONS)
SHOW ITS THREE ORTHOGRAPHIC VIEWS
1. Front View
2. Top View
3. L.H.S.View
Use First Angle
Method
A
B
a
b
3
c
2
1

171. F.V
T.V
L.H.S.V.
B
a
c b
3
2
1
b
3
A

172. FIGURE SHOWS ISOMETRIC VIEW OF AN
OBJECT(WITHOUT DIMENSIONS) SHOW ITS
THREE ORTHO GRAPHIC VIEWS
1. Front View
2. Top View
3. L.H.S.View
Use Third
Angle Method
A
a
b
3 c
2
1

173. b a
TOP VIEW
A
3
L.H.S VIEW FRONT VIEW
c
2 1

174. Aim : Figure shows isometric
view, of a simple
machine component.
Draw its following Orthographic
views, & dimension them.
1. Front View
2. Top View
3. R.H.S. View
Use First Angle Method of projection

175. 10
10
30
10
50
20
75
40
R25
X
Figure, is the isometric view
Figure
L = 75+25=100
H = 10+30=40
D=50

176. R25
10
10
F.V.
20
50 10
40
40
25 75
T.V.
R.H.S.V.
ORTHOGRAPHIC
VIEWS
F.V L=100
H=40
T.V L=100
D=50
S.V D=50
H=40

177. 5
5
30
45 35 35
25 SQ
40 15
15 SQ
10
10
Ø30,Depth 10
40 SQ
ISOMETRIC
ORTHO. VIEWS

178. 2255 SSqq
4400 1155
3355 3355 4455
1155 SSqq
1100
4400 SSqq
ØØ3300
55
1100
3300
1100
55
RR..HH..
SS..VV..
FF..VV..
TT..VV..

179. Exercise :-
 Figure shows the isometric
view of a vertical shaft support.
 Draw its all the three views,
using first angle method of
projections.
 Give the necessary dimensions
as per aligned system.

180. IISSOOMMEETTRRIICC
VVIIEEWW
140
Ø64
Ø40
24
20
10
48
50
25

181. 14 14
48
70
24
10
Ø40
50
Ø64
30
140
FFRROONNTT VVIIEEWW LL..HH..SS..VV
TTOOPP VVIIEEWW

182. EExxeerrcciissee ::--
Isometric view of a rod support is
given.
Draw its all the three orthographic
views, using first angle method of
projections.
Give all the dimensions.

183. ISOMETRIC VIEW
16
20
40 20
20
20
Ø24
R22
140
40
80
60 30
X

184. 20
TOP VIEW
R22
40 20
10
FRONT VIEW
RIGHT SIDE
VIEW
140
80
SCALE: 1:1
30 30
66
26
30

185. R20 20
10
8
100
45
16
20 25
R8
30
10
30
ISOMETRIC
ORTHO. VIEWS

186. 45
30
8
20 25
16
R8
R20
30
20
10
100