 Charles J. Kachmar

GOALS: After this chapter you should be able to: Explain different views of an object Explain how an object can be revolved to illustrate different views. Explain how the idea of a “glass box” can be used to explain views. Be able to identify the necessary views of a given object that is to be drawn. Identify typical objects that usually require only two views. Be able to sketch three or more views Be able to place the views correctly on the page.

Every Object is subject to laws of nature. We live in a three dimensional world. Therefore there are three essential dimensions that must be represented in a mechanical drawing: Width Height Depth

The front view shows what two dimensions? Width and height The right side view shows what two dimensions? Height and Depth The top shows what two dimensions? Width and the depth

Refer to figure 7-5 in your text. The Glass Box. Hidden Lines: Used to show hidden parts (edges). Drawn with a dashed (hidden) line. The edge would not be visible in the right side view so we use a hidden line to show it is there.

The Right Side, Front and Top views are known as “the Three Standard Views.” In circular drawings we use center lines to indicate roundness. Sometimes only two views are required.

One of the worst things you can do is draw a view out of place. Always use this orientation: TOP FRONTRIGHT SIDE

Line up your views. Use construction lines for measuring. Use a 45 degree angle to project measurements from top to right side view.