NBN EN 20286-1 : 1993

National foreword
Committees responsible
Specification
0. Introduction
1. Scope
2. Field of application
3. References
4. Terms and definitions
5. Symbols, designation and interpretation of
     tolerances, deviations and fits
6. Graphical representation
7. Reference temperature
8. Standard tolerances for basic sizes up to 3 150 mm
10. Bibliography
Annexes
A. Bases of the ISO system of limits and fits
B. Examples of the use of ISO 286-1
C. Equivalent terms
Tables
1. Numerical values of standard tolerance grades IT
     for basic sizes up to 3 150 mm
2. Numerical values of the fundamental deviations of
     shafts
3. Numerical values of the fundamental deviations of
     holes
4. Basic size steps
5. Numerical values for standard tolerances in grades
     IT01 and IT0
6. Formulae for standard tolerances in grades IT01,
     IT0 and IT1 for basic sizes up to and including
     500 mm
7. Formulae for standard tolerances in grades IT1 to
     IT18
8. Rounding for IT values up to and including standard
     tolerance grade IT11
9. Formulae for fundamental deviations for shafts and
     holes
10. Rounding for fundamental deviations
Figures
1. Basic size, and maximum and minimum limits of size
2. Conventional representation of a tolerance zone
3. Clearance
4. Clearance fit
5. Transition fit
6. Interference
7. Interference fit
8. Schematic representation of clearance fits
9. Schematic representation of interference fits
10. Schematic representation of transition fits
11. Shaft-basis system of fits
12. Hole-basis system of fits
13. Schematic representation of the positions of
     fundamental deviations
14. Deviations for shafts and holes
15. Graphical representation
16. Simplified schematic diagram
17. Deviations for shafts
18. Deviations for holes
19. Deviations js and JS
20. Diagrammatic representation of the rule given in
     A.4.2 b)

Establishes the bases of ISO system of limits and fits together with the calculated values of the standard tolerances and fundamental deviations. These values shall be taken as authoritative. Also gives terms and definitions together with associated symbols. Contains several tables and figures.