ISO 4291:1985 Preview

Methods for the assessement of departure from roundness -- Measurement of variations in radius

Establishes types of contact (stylus) instruments to be used, recommendations for their use, procedures for calibration of instruments and verification of their characteristics. Applies to a profile transformation, obtained under reference conditions. Departures from roundness of the measured profile, procedure, calibration and determination of systematic errors of rotation are dealt with in annexes A to D, respectively. Annex E gives rules for plotting and reading polar graphs. The position of the least squares centre can be calculated from a simple explicit equation given in annex F.


General information

  • Current status : Published
    Publication date : 1985-09
  • Edition : 1
    Number of pages : 18
  • :
    ISO/TC 213
    Dimensional and geometrical product specifications and verification
  • 17.040.20
    Properties of surfaces

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