This article will describe how you can get an accurate minimal material estimate for your part using the Bounding Box tool. A Bounding Box is a ‘box’ that tightly encompasses your part geometry, giving you height, width and length values for the part. These dimensional values can be in any units you desire (this will be address later in the article). A typical application would be to estimate the minimum size of aluminum block you’d need to machine the part, or to estimate packaging needed for a given part. In addition to the ‘box’ shape, there is also a ‘bounding cylinder’ and a ‘bounding sphere’ which are available via the drop down list at the bottom of the Bounding Box tool button.
How to Use the Bounding Box ToolTo use the Bounding Box tool, select the part, and then, from the Operations toolbar, select Bounding Box; it’s important to click the upper part of the Bounding Box button since the button flyouts at the bottom have options for a B-Sphere and B-Cylinder. The following step-by-step sequence will reference the image at right, which is coded with four steps:
- Select the part  you want to perform a Bounding Box calculation on. You can use the Single Select tool to click on a part; by default, Single Select defaults to Dynamic mode, which means a single click will select a face, a double click will select a part, and so on. You may prefer to set Single Select to Body mode, so that a single click will select an entire solid body. Alternately, you may want to use the Select All tool which will select everything in the file. In any case, your part has to be selected in order to use the Bounding Box tool.
- From the Operations toolbar , click the Bounding Box button . Make sure to click the top part of the button, as it is possible to accidentally select one of the other bounding box shapes if you click too far down.
- A Bounding Box  should now be created around your part.