What is cylindricity and how do you actually measure it?

If you've spent any time looking at mechanical drawings or even hanging around a machine shop, you've probably asked yourself what is cylindricity and exactly why it seems in order to cause so many headaches for high quality control teams. From its heart, it's one of the most complex callouts in Geometric Dimensioning and Tolerancing (GD& T) because this isn't just searching at one point; it's looking in the entire surface of a cylindrical part all from once. ...

March 22, 2026 · 7 min · Mielcarek Quesada