What is Geometric Dimensioning & Tolerancing?

Geometric Dimensioning and Tolerancing (GD&T) is a symbolic language used on engineering drawings and models to precisely define the allowable variation in the form, size, orientation, and location of part features. It's a more precise and comprehensive method than traditional coordinate dimensioning, ensuring parts function correctly and are interchangeable. GD&T is commonly used to reduce manufacturing costs by maximizing tolerances while maintaining design intent, facilitate communication between design and manufacturing, and improve quality control.