2. X Fig 2(b) P.P H D R.H.S.V. Z2Z2 Y X V.P L F.V. H.P T.V. Z2Z2 L D H Fig 2(a) X Y YY

3. Note : I st 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 Z 2 direction

4. 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 (Z 2 directional view) is on P.P Fig. 2(c) shows turning of the planes H.P & P.P with their respective hinges, considering plane V.P as fixed plane. 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 I st angle method of projections is placed as shown on fig. 2(c)

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

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

7. 100 20 80 20 40 20 60 R40 Ø40 ISOMETRIC VIEW X

8. R40 20 100 80 ø40 80 20 TOP VIEW FRONT VIEW R.H.S.V SCALE: 1:1 SYMBOL IS NOT MARKED 20 R20

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

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

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

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

13. 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

14. 10 Figure, is the isometric view 10 50 75 40 20 R25 30 X Figure L = 75+25=100 H = 10+30=40 D=50

15. R25 10 20 F.V. 50 10 40 25 75 40 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

16. 5 5 45 35 30 40 15 10 25 SQ 15 SQ 10 Ø30,Depth 10 40 SQ ISOMETRIC ORTHO. VIEWS

17. 25 Sq 40 15 453535 15 Sq 40 Sq Ø30 5 10 30 10 5 10 R.H. S.V. F.V. T.V.

18. FF igure shows the isometric view of a vertical shaft support. DD raw its all the three views, using first angle method of projections. GG ive the necessary dimensions as per aligned system. Exercise :-

19. ISOMETRIC VIEW 140 Ø40 Ø64 24 20 10 48 50 25

20. 14 48 70 24 10 Ø40 50 Ø64 30 140 L.H.S.V FRONT VIEW TOP VIEW

21. 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. Exercise :-

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

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

24. 10 8  20 R20 100 45 16 20 25 R8 10 30 ISOMETRIC ORTHO. VIEWS

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