 myself is C. L. Rathod, a student professor, department of mechanical engineering, Walsh and Dishrubh technology, Sholapur. Today's topic is orthographic projections of simple object. At the end of this lecture, student will be able to draw the orthographic projections of simple object. So, this is the simple object. So, we have to selected this simple object. So, this is the object we have to draw. This is the 3D object. We are going to convert this into 3D into 2D. So, this is the direction of view. This is the front view, top view and the side view. So, first what I have to do? I have to take the reference line. So, this is the reference line. So, another reference line I have to take. Thank you. Myself is C. L. Rathod, a student professor, department of mechanical engineering, Walsh and Dishrubh technology, Sholapur. Today's topic is orthographic projections of simple object. At the end of this lecture, student will be able to draw the orthographic projections of simple object. So, this is the simple object. So, we have to selected this simple object. So, this is the object we have to draw. This is the 3D object. We are going to convert this into 3D into 2D. So, this is the direction of view. This is the front view, top view and the side view. So, first what I have to do? I have to take the reference line. So, this is the reference line. So, another reference line I have to take. The length is given. Height is given. So, this is the x, y, x dash and y dash. So, length is given. So, length is given is 98 and width is given 42 and height is given. This is the 20 plus 21 and 21 radius is given. So, total height is 42 plus 20. 62 is the height. 62 mm is the height. 42 mm is the width and 98 is the length. So, what I have to do? I have to take the length that is equal to 98. And then from this point, what I have to do? I have to take the 20 mm. So, 20 mm, when we see from the front, we will going to see this slot and this slot. So, for that, so, 20 height I will be going to take. So, from this I will going to take the 20 mm. And from this side also I have to take 20 mm. And then I will going to complete the block. So, 20 mm block I have to complete this. And another dimension is given that is 6 mm. So, from this I have to take from this 6 by 14 block I have to prepare. So, from this I have to take 14. And this side also I have to take 14. And from this I have to take 6 mm above. Similarly, here I have to take 6 mm. And I will going to draw the this block, complete block. And I will going to complete this block. So, next what I have to do? I will going to select the axis line. So, I have to take divide this 98 by 2 that is 49. So, I have to take the 49 from this. Then I have to take the axis line. I will going to take the axis line. Then so, from this, so, from this end 24 is given. So, I have to take 24 mm. From this I have to take 24 mm. And I will going to draw the axis line. And from this 24 50 mm is 50 mm center to center distance is given. So, I have to take 50 mm. And I will going to select another axis line. And the diameter when we see from the front this hole is not going to see. Then what I have to do? So, this diameter dimension is given 12 mm. So, on both side I have to take 6 mm, 6 mm both side. And similarly, here 6 mm on both side. Then so, when we see from the front it will not going to see this dimensions. For that I have to draw the dotted line. Similarly, I have to draw the dotted line here also. And then so, from this point so, 21 is the given at the tone. I have to take the 21 mm from this point. And I will going to draw the another axis line for this hole. So, then so, when we see from the front this hole is not going to see. Then what I have to do? From this center to radius is given 21, 21 mm. So, I will going to take 21 from this. And then when we see, when we see from the front we are not going to see this video. So, for that another slot is given that is 14 mm. So, what I have to do? I have to take 7 mm, 7 mm each side. And I am going to complete the this slot up to. So, this is how we are going to complete this block. And at the center this hole is not going to visible to us. Then what I have to do? So, its radius is given 21. Then and its dimension its dimension is given 20. Then I have to do I have to take 10 mm each side. And I am going to draw the dotted line for that hole. So, this is how we are going to draw the front view. When we see from the top we will going to see this slot and this two holes and this surface, both the surface. And what I have to do? I have to project the lines. I have to project the lines. This is the projection. So, I have to project this lines. This is the axis line. And this is the projection of another line. This is the axis line. So, this is the line. This is the axis line I have to select and this is the another line. So, this is the projection and width is given 42. So, what I have to do? I have to prepare the block of 42 by 98. So, this is the 48 by 92 block I have to prepare and then what I have to do? I have to select one axis line dividing this 42 by 2 then I will going to get 21. So, I will going to draw the dotted line here. Then, so now pause the video and think about the top view. So, about this hole how it going to look in this top view? I think you drawn this top view of this hole. So, I will going to show you how to draw this top view. So, what I have to do? I have to take the distance this as the distance this is the center and I have to draw this top view of this hole then and when we see from the top this hole is not going to see. So, for that I have to prepare the so this surface. So, before that I have to draw this edge. So, we will going to see this complete edge. So, this is dark line and when we see from the top this edge is not going to visible to us. So, for that I have to draw the dotted line. Similarly, for this also I will going to draw the dotted line and then when we see from the top we will going to see this edge. So, for that I have to draw the complete dark line here also and here then. So, when we see from the top this hole is not going to visible. So, for that what I have to do? I have to take 10 mm each side and I will going to draw the dotted line for that one. So, now what I have to do? I have to mention the dimensions this is the 42 and this is the 98 length is given and this height is 20 mm is given and this length is given that is 14 mm and this is also given 6 mm and from this it is 21 and from this end this is the 24 is given and centre to centre distance is given that is 50 mm and here is also we are going to take 21 is the radius and this whole dimension is given that is 20 mm and similarly this hole is also given 20 mm. This is how we will going to calculate we will going to draw the simple object. Thank you.