NORMSERVIS s.r.o.

ISO 4291:1985

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

NORMA vydána dne 12.9.1985

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The information about the standard:

Designation standards: ISO 4291:1985
Publication date standards: 12.9.1985
The number of pages: 18
Approximate weight : 54 g (0.12 lbs)
Country: International technical standard
Kategorie: Technické normy ISO

Annotation of standard text ISO 4291:1985 :

Description / Abstract: 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.