Does Runout Equal Concentricity?

Concentricity is considered the circular form of GD&T symmetry. ... Runout is a combination of concentricity and circularity. Runout = Circularity + Concentricity. If a part is perfectly round, the runout will equal the concentricity.

What is difference between circularity and runout?

Circularity is a 2D callout that controls only form. It cannot be referenced to a datum axis. ... The Circular Runout callout (commonly referred to as runout) controls location, orientation, and (usually) form in two dimensions. One exception is when the size tolerance is more strict than the runout tolerance.

What is the difference between circular runout and concentricity?

While concentricity looks at how well a cylindrical feature is centered on a theoretical axis, runout looks at how much the feature deviates from a perfect circle that is perfectly centered on an axis of rotation.