This standard covers the specification and measurement of out-of-roundness of a surface of revolution by the evaluation of a typical cross-sectional profile in terms of its radial deviations from a defined center. While this standard deals primarily with precision spindle instruments for out-of-roundness measurement and polar chart presentation, it is not the intent here to exclude other methods which will provide valid radial deviation data. This standard does not define the design requirements for roundness suitable for specific purposes, nor does it specify the manufacturing process for production of roundness.

Note: This standard is no longer an American National Standard as of January 2013. It is still available for use as an ASME-approved standard.