A boxed dimension is defined as what type of dimension?

A boxed dimension is defined as a basic dimension. Basic dimensions are used in engineering drawings to specify the exact size or location of a feature, with the understanding that they are the foundation or starting point for measurements. They are typically enclosed in a box to distinguish them from other types of dimensions, indicating that they are not subject to tolerancing but serve as a control for the features produced based on them.

Using boxed dimensions helps ensure that manufacturing processes adhere closely to the specified design intent, without the influence of additional tolerances that could complicate interpretation. This contributes to the precision and consistency of manufactured parts. In the context of CNC machining, utilizing basic dimensions accurately is crucial for maintaining quality and fit during assembly processes.

The other categories of dimensions, like reference, detailed, and derived, serve different purposes and contexts in engineering drawings, but they do not carry the same significance as basic dimensions when discussing the exact specifications of features.