Graphic Communication Isometric Views CDT Department

Isometric Drawings Lengths and breadths are drawn at 30° to the horizontal. Heights are drawn vertically. All sizes are drawn to their exact sizes. Circles cannot be drawn using compasses.

Isometric Drawings - Crates A crate is something that will help you draw isometric drawings. They can be used for small parts of the drawing to simplify the bigger drawing.

Isometric Drawings - Crates Begin constructing your crate by drawing the 2 lines at 30° to the horizontal and the vertical line of the front corner. 30° 30°

Isometric Drawings - Crates Next mark on the height of the crate and the lengths of the sides. These lengths are all full size as described on your drawing.

Isometric Drawings - Crates

Isometric Drawings - Circles You cannot draw circles in an isometric drawing using compasses. You must convert a circle into sectors and transfer points of the circle onto an isometric grid.

Isometric Drawings - Circles The face of the cylindrical bar is circular as drawn below.

Isometric Drawings - Circles To draw this face is an isometric drawing we have to split it up into sectors. To do this we use a 30/60 set square and draw a clockface on the circle.

Isometric Drawings - Circles To draw this face is an isometric drawing we have to split it up into sectors. To do this we use a 30/60 set square and draw a clockface on the circle.

Isometric Drawings - Circles To draw this face is an isometric drawing we have to split it up into sectors. 12 1 11 10 2 To do this we use a 30/60 set square and draw a clockface on the circle. 9 3 8 4 5 7 6

Isometric Drawings - Circles Now project lines across from the marks on the circle to the centre line. 12 1 11 Use your parallel slide on your drawing board to do this. 10 2 9 3 8 4 5 7 6

Isometric Drawings - Circles Now create a grid on your isometric crate to help you draw the isometric circle. Length   Length  The crate should be drawn to the diameter of the face being the length and breadth of one face and the depth being the other dimension.

Isometric Drawings - Circles First, draw the centre lines on the face of the crate.

Isometric Drawings - Circles Then, draw the construction lines from the circle. You can use a compass to find the distance between each of the lines. 12 11 1 10 2 9 3 8 4 5 7 6

Isometric Drawings - Circles Now, use a compass to mark along the lines the distance to where the circle would cross them. 12 11 1 10 2 9 3 8 4 5 7 6

Isometric Drawings - Circles Finish marking all the points using this technique. 12 11 1 10 2 9 3 8 4 5 7 6

Isometric Drawings - Circles Now complete the isometric circle by joining up the points. This curve should be drawn freehand and should be smooth. 12 11 1 10 2 9 3 8 4 5 7 6

Isometric Drawings - Circles To complete the cylinder extend the length back and project the length from the front face to the back face and complete the curve.