Advisor / ISO GPS reference / Circular run-out
Run-out tolerance · ISO 1101
Circular run-out
Limits the variation at any single circumference position when the part turns about the datum axis.
In the shop
Runout follows how the part sits in the machine. Turn the diameters in one chucking or between centers, and check chuck and collet runout before the finishing cut.
General shop guidance in our own words. The drawing and the standard it cites decide; verify on a sample part.
Related run-out tolerances
Ask about your drawing
Tell the advisor the feature, the tolerance on the drawing and the material. It answers with machining choices, brand-neutral.
Sources
Definition written in our own words and checked against keyence.com. Symbol and term names follow ISO 1101; we do not reproduce standard text. See the full index.