This geometric tolerance describes the radial deviation of a target feature when the target is rotated around an axis or straight line.
The specification of a reference point is always required.
A distinction is made between total runout (radial) and total runout (axial):
Total runout (radial) = total runout tolerance.
In this case, the tolerance zone is limited by two coaxial cylinders which are at a specified distance from each other and parallel to the specified reference axis.