The Tolerances cheat sheet is a quick-reference guide for engineers who need to apply Geometric Dimensioning & Tolerancing (GD&T) with confidence. It breaks down critical tolerance types—such as flatness, circularity, cylindricity, straightness, parallelism, perpendicularity, angularity, and true position—into clear definitions, measurement methods, and drawing callouts.

You’ll learn which tolerances require datums, when MMC or LMC applies, and how to interpret feature control frames. The guide also includes practical tips for inspection techniques using gauges and CMMs, helping you ensure parts meet functional and regulatory requirements.

Whether you’re designing for medical devices, aerospace, or semiconductor components, this resource simplifies complex GD&T concepts so you can reduce errors and accelerate production.