 Hello everyone, I am R. B. Patil, Assistant Professor, Department of Mechanical Engineering Walsh and Institute of Technology, Solapur. Today, we will discuss about the isometric projections. At the end of this session, student will be able to draw the isometric projections. Now, before starting the isometric projection, can you define the, what is isometric view? The basic difference between isometric projection and isometric view is that, for drawing the isometric view, true scale is used. Whereas, for drawing the isometric projection, reduced scale, nothing but isometric scale is used. Now, we start with how to draw the isometric scale. First, for drawing the isometric scale, draw first one horizontal line. With this horizontal line, draw angle of the size 30 degree. This angle is of 30 degree. Now, from same point, draw another angle of size 45 degree. From this point, again draw the second projections with angle of 40 by degree. Suppose, this is Abel, this is A C and this is A D. Now, project each point or each mark on the 45 degree. First, fourth, fifth, sixth, seventh, etc. For visibility purpose, we use n 2 3 4 5 6 7. These are the true scales or true scale. Now, this true scale, you have to project on 30 degree mark with perpendicular projection. Project all scale from 1 to 7 on 30 degree mark. Now, on this 30 degree mark, this is 1, this is 2, this is 3, this is 4, 5, 6 and 7. This scale is isometric scale and this is true scale. Now, what is the difference between isometric scale and true scale? Isometric scale is drawn on the 30 degree marks. Means what? You have to draw 45 degree line on that project all the marks or a true scale project that true scale on the 30 degree mark. So, that you will get reduced scale called as a isometric scale. Now, with this isometric scale, you have to solve the problem. Take a simple problem where this is 50, this is 40, height is 30, this is 10, this is 10. Now, this is left hand side view and this is front view. Same problem you have to solve. Starting point is similar as that of the isometric view. Draw a horizontal line, mark the primary axis that is isometric axis from this point project 30 degree marks. This is front view side, this is left hand side view side. In front view, total distance is 50. So, while taking the distance, consider the isometric distance. What you want? Total 50. Take 50 mm with this 50 mm. Draw the parallel line to this isoplane. So, that you will get iso line, similar iso line parallel to this axis. Now, second dimension is, sorry height is 30. Take height as a 30 and length as a 40. Now, draw parallel lines to this. This you will get the outer box. Now, how to project the points? In front view, you get this distance as a 10. In left hand side view, this distance as a again 10. Take 10 mm from isometric scale, mark this. Total height is 10. This height is again 10. So, draw a line parallel to this. Again, second line parallel to this iso line. Now, same points you have to project to the remaining sides. Draw again parallel line. Now, join this. Again, draw parallel line to this iso axis and parallel line to this. For visibility purpose, right now I am going to rub this remaining work, but keep in mind that while drawing, do not rub the entity. For visibility purpose, I am making dark. This shows the isometric projection. I hope you will understand the method of drawing the isometric projection. Similar way, if you want to draw the circle with the using isometric projection, just use the isometric scale while drawing the object. Thank you.