Jan 26, 2021 · Circular runout, commonly known as just ‘runout’ is a 2D measure of a circular profile in relation to a datum axis. It inspects how well a circular cross-section conforms to a perfect circle much like circularity.

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.

Runout as a GD&T symbol is often referred to as circular runout to differentiate it from total runout. Runout is a relation of surface to datum surface or surface to datum axis.

There are two variations of runout control in geometric dimensioning and tolerancing (GD&T): Circular runout and total runout; both are checking a similar mechanical behaviour, but circular runout is slightly simpler and less restrictive than total runout. In this article, we focus on circular runout; a separate article covers total runout.

Apr 22, 2021 · Circular runout (often referred to as “runout”) is a 2D measurement of the circular profile of the reference axis. It checks how well the circular cross section fits the ideal circle, just like roundness.

General: Circular runout measures how much “wobble” occurs on the controlled surface when the part is rotated 360° around a datum axis. The controlled feature can be a circular element sharing the datum’s axis or a plane perpendicular to the datum’s axis.

Jan 20, 2025 · Circular runout measures how much a circular feature deviates from its expected centerline, using precision tools like dial gauges. During inspection, the part is rotated around its axis, and the variation of the feature’s surface is measured to ensure it …

Dec 28, 2023 · What is Circular Runout Tolerance? Circular runout controls the variation of a surface element (a single line on the surface) when the part rotates around the datum axis. This tolerance limits the radial and axial displacement of the cylindrical surface or end face of a part.

Jan 13, 2025 · Circular runout is a geometric tolerance that controls the variation in the circular profile of a part as it rotates around an axis. It measures the total of any out-of-roundness, eccentricity, or other deviations from a perfect circular form as …

Sep 6, 2023 · Circular runout is a 2D tolerance that limits the runout at a particular point along a feature’s length. It is essential when a rotating shaft has multiple diameters, and you need to control one specific diameter’s runout concerning the shaft’s axis.