What is Flatness in GD&T?
Geometric Dimensioning and Tolerancing (GD&T) is the language of precision in manufacturing. It’s how engineers make sure parts are made exactly to spec. GD&T is crucial for ensuring that parts not only fit together correctly but also function as intended. It bridges the gap between design and manufacturing, ensuring everyone’s on the same page.
Within GD&T, flatness is a geometric tolerance that specifically addresses how uniform a surface is. It controls how much a surface can deviate from a perfectly flat plane. In other words, it ensures that the surface conforms to the limits specified in the design.
Flatness is particularly important when parts need to have very precise surface contact, like in sealing applications. For example, think about sealing devices. Flatness ensures those devices seal effectively. When dealing with these parts, even minor deviations can lead to leaks and failures.