Run-out Tolerance (Run-out Deviation) | GD&T Fundamentals

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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
• Total 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.

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 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.

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.

• Types of Geometric TolerancesLocation Tolerance (Location Deviation)
• Types of Geometric TolerancesMaximum Material Condition (MMC) and Least Material Condition (LMC)

INDEX

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• GD&T Overview
  • What Is GD&T?
  • GD&T Drawings and Symbols
  • What Are Datums?
  • Feature Control Frame
  • International Industrial Standards and GD&T
• Types of Geometric Tolerances
  • Form Tolerance (Form Deviation)
  • Form Tolerance and Location Tolerance (Profile Tolerance of Line / Profile Tolerance of Plane)
  • Orientation Tolerance
  • Location Tolerance (Location Deviation)
  • Run-out Tolerance (Run-out Deviation)
  • Maximum Material Condition (MMC) and Least Material Condition (LMC)
• Understanding Datums
  • Major Types of Datum Features
  • Common Datums and Datum Systems
  • Datum Targets
• GD&T Measuring Instruments and Principles
  • Measuring Instruments
  • Measuring Machines
• Measuring Form Tolerance
  • Measuring Straightness
  • Measuring Flatness
  • Measuring Roundness
  • Measuring Cylindricity
  • Measuring the Profile Tolerance of Line
  • Measuring the Profile Tolerance of Plane
• Measuring With Datums: Orientation Tolerance
  • Measuring Parallelism
  • Measuring Perpendicularity
  • Measuring Angularity
• Measuring With Datums: Location Tolerance
  • Measuring True Position
  • Measuring Coaxiality
  • Measuring Concentricity
  • Measuring Symmetry
• GD&T Techniques
  • Envelope Requirement
  • Maximum Material Condition (MMC)
  • Least Material Condition (LMC)
  • What Is a Projected Tolerance Zone?
  • GD&T of Non-Rigid Parts
• Glossary
• GD&T Symbols

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