 Hello everyone. Myself is C.L. Rathod, Assistant Professor, Department of Mechanical Engineering, Walsh and the Institute of Technology, Solapur. Today we are going to start a new topic that is orthographic projections of simple objects. At the end of this lecture, student will be able to draw the orthographic projections of simple objects. So, this is the object which is selected for this our video lecture. So here draw the orthographic view of the given drawing that is front view and top view. We are going to interested to draw the top view and front view of the given objects. So, this is the object which we are going to selected and here we are seeing from the x direction. So, from this one we are going to draw the front view. When we see from the front view, the complete block of 15 by 100 mm is visible. So, I am going to hash this one. So 15 by 100 block, complete block will visible when we see from the front view and this block is visible. So, this complete block is visible. Its height is you can see here its base is 100 mm and height is here we can consider here is 15 plus 35. So, 15 plus 35 it means 60 mm is the height. So we are going to consider this 100 by 50 mm. So we are in order to draw this one we require the reference line. So here we are going to consider the two reference one reference line that is so this is the x and another one is x y line we are going to consider here. So, this is the x y line x 1 and y 1. And now when we see from the front view in the x direction we are going to see that this 100 by 15 block is visible. So I am going to take 100 by 15 block. So I am going to consider 15 mm from this side and 15 mm from this side and I am going to complete this 100 by 15 mm block. And here when we see from the front side its base from this base is 35 mm is given. So from this I am going to consider 35 mm this is the 35 mm this side and its total length is 10 plus 50 mm we are going to consider here. So for that one we are going to take 10 mm from this and then 30 mm from this and then another 10 mm so I am going to consider this 10 mm. So for that I am going to draw this block of 10 by 35 here also 10 by 35 on both side and I am going to complete this block of 10 by 35, 10 by 35 height. And when we see from the front view this chord shape is visible. So for that we are going to take 30 of divide this two is 15 mm we are going to consider here and I am going to place this our compass here and I am going to completely draw the our circular portion this one. So when we see from the front view you can see here this portion is visible this 15 by 100 mm and 35 by 50 mm block is visible when we see from the x direction. So now pause the video and think that which portion is not visible when we see from the front view. I hope you have understood that when we see from the front view you can see here one circular hole is given its diameter is given 20 mm and from this to length is given 25 mm from this end we are going to consider that 25 mm. So I am going to take this from this I am going to take 25 mm so here and I am going to draw the one axis line so from this one I am going to draw the one axis line. So on that one we are going to draw this object of circular hole is 20 mm so I am going to consider 10 mm both side its length this side 10 mm and this side 10 mm and when we see from the front view it is not visible completely so for that I am going to represent this as dotted line and when we see from the front view so this rectangular shape sliding block is visible and its length is 20 mm from this corner so I am going to take 20 mm from this one so here I am going to consider this 20 mm and I am going to draw this sliding block of 10 by height of 35 mm. So now when we see from the front view whatever the things which is visible we have drawn so now we are going to dimension the things all the dimensions here so its base is 100 mm so this is the 100 mm we have to draw the block of 100 mm by 15 mm and its height is given 15 mm so I have to draw this 15 mm and its length is given its vertical length is given that is 10 10 and 30 mm block so this is the 10 mm this is the 30 mm block is given and another is 10 mm. Now we are going to draw the top view so for that one we require the projectors from all the corners we are going to draw the projectors so all the draw the projectors of all the edges so from this also we have to project this one now when we see from the top you are going to visible this complete block this complete block this complete block and this sliding edge and this complete hole now and this also you are going to visible when we see from the top view so now its base is given that is 100 mm so this is the 100 mm we are going to consider here and the radius is given is 25 so it means its diameter is 50 mm so we are going to consider the 50 mm both side here and we are going to complete the plan of 100 by 50 mm and now you can see here this diameter is given 50 mm and radius is 25 mm so I am going to divide this half of this one is 25 and then I am going to draw the one center line now after keeping this as here center so draw this chord shape and now so you can see here when we see from the top view this hole is complete hole is visible so for that we have to draw this complete hole so this complete hole is visible now when we see from the top this block is visible this block this block is visible so for that so its length is given 15 mm from this 15 mm I am going to leave from this 15 mm then I will going to draw this block of 10 by 15 and I will going to complete this block and this block and when we see from the top this sliding edge is visible so this sliding block is visible and its length is 10 mm is given so I am going to measure this 10 mm from this and I am going to draw up to the projector so this is the projector up to this I am going to draw so this is how we are going to complete at the top view of the given object so this is the reference I have taken for this video lecture that is Engineering Graphics by Sri Thakur and Dinesh Singh Mahalakshi Publication House thank you