Run-out Tolerance (Run-out Deviation)

Run-out tolerance is a geometric tolerance that specifies the run-out fluctuation of a target’s feature when the target (part) is rotated on an axis (specified straight line). A datum is always necessary to indicate run-out tolerance; as such, it is a geometric tolerance for features related to datums.

Circular Run-out

Circular Run-out

Circular run-out specifies the run-out of any part of a circumference when a part is rotated.
To meet the circular run-out requirement, the run-out of the measured value when the part is rotated must be within the specified range.

Sample indication
Circular Run-out
Explanation of drawings
The run-out of the cylindrical surface in the radial direction, indicated by the indication arrow, must not surpass 0.03 mm on any measurement plane perpendicular to the datum axis line when the target is rotated once on the datum axis line.

Total Run-out

Total Run-out

Total run-out specifies the run-out of the entire surface of a part when it is rotated.
To meet the total run-out requirement, the run-out of the measured value of the entire cylinder surface must be within the specified range.

Sample indication
Total Run-out
Explanation of drawings
The total run-out of the cylindrical surface in the radial direction, indicated by the indication arrow, must not surpass 0.03 mm at any point on the cylindrical surface when the cylinder part is rotated on the datum axis line.

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