Geometric Dimensioning and Tolerancing, or GD&T, is a language used in manufacturing to make sure parts meet design specs and work as intended. Think of it as a set of rules that ensures everything fits together correctly.
Concentricity is one of those GD&T controls. It makes sure that one part of a feature is centered around an axis. It’s a three-dimensional control, ensuring that the mass is evenly distributed around the center axis.
Measuring concentricity can be tricky and often requires specialized equipment. Because of these challenges, other GD&T controls like circular runout or true position are often used as alternatives.
This article provides a comprehensive overview of concentricity, discussing its applications, how it’s measured, and some of the alternatives you can use.