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.

Total runout (axial) = Total axial runout tolerance
Two parallel planes at a given distance from each other and perpendicular to the reference axis form the tolerance zone.

Total runout in Injection Molding

Quality Assurance: The shell surface has to be between two cylinders with radial distance 0.2mm

Related topics:

This glossary of plastic industry is provided by PLEXPERT Canada Inc.