Often, it informs us of the fixing assembly to be used during manufacturing or inspection. Sometimes, it tells us that we can be more permissive to reduce production costs.

Furthermore, it emphasizes that all of the geometric characteristics and tolerances written on a technical drawing are there for a specific purpose of functionality. This blog post aims to guide you through the basic concepts and definitions of geometric dimensioning and tolerancing (GD&T) more precisely, this includes what GD&T is, how it works, and why it is important to implement GD&T processes.

What does GD&T stand for: Geometric Dimensioning and Tolerancing. We only have to imagine the magnitude of the technical issues and defaults that would occur if this language did not exist! Part manufacturing and inspection also require the rigorous interpretation of the information communicated by this language. They are also helpful for choosing the appropriate materials and manufacturing processes during production planning. It is made of a set of very precise standards, symbols, and rules that convey the geometric characteristics and tolerances of a part.Įngineering uses technical drawings in designing and developing products. It is through its dimensioning and tolerancing information, the technical drawing speaks a language that is intended to be common to all.

Flatness symbol gd&t