When applied to surfaces constructed around a datum axis, circular runout controls variations such as circularity and ____________________.

Circular Runout

A form of measurement that checks the roundness and concentricity of a cylindrical object's surface as it rotates.

Circularity

The condition where all points on a circle’s circumference are equidistant from the center, measuring roundness.

Datum Axis

Datum Axis refers to an imaginary line, plane, or point referenced in manufacturing and design to measure the geometry of parts and assemblies for precise construction.