BS 7172:1989
Current
The latest, up-to-date edition.
Guide to assessment of position, size and departure from nominal form of geometric features
Hardcopy , PDF
English
31-07-1989
Foreword
Committees responsible
Guide
1. Scope
2. Definitions
3. Symbols and abbreviations
4. Outline of guide
5. Parametrization of geometric elements
6. Measurement procedure
7. Data pre-processing
8. Establishing a reference
9. Departure from nominal form
10. Information to be provided by an assessment
11. Numerical considerations
Appendix
A. Formulae for distance of a point to a geometric
element
Table
1. Minimum numbers of points
Figures
1. A distribution of points on a line
2. A distribution of points in a plane
3. A 'chess board' distribution of points in a plane
4. A distribution of points on a lobed circle
5. A distribution of points on a sphere
6. A distribution of points on a cylinder
7. A distribution of points on a cone
8. Example of a profile with two equal maximum
inscribed circles, centred at A and B
9. Example of a profile with a locally maximum
inscribed circle, centred at A
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