DIN EN 14874:2006-02

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements, dimensions
  4.1 General
  4.2 Material
  4.3 Number of teeth
  4.4 Dimensions
5 Testing
6 Designation
7 Marking
Annex A (informative) Calculation principles
        A.1 General
        A.2 Reference diameter D[0] in millimetres
        A.3 Groove base diameter d[3] in millimetres
        A.4 Supporting diameter d[4] in millimetres
        A.5 Groove width b in millimeters
        A.6 External diameter d[1] in millimetres
        A.7 External width c in millimetres
        A.8 Chain pocket
            A.8.1 Pocket length w in millimetres
            A.8.2 Horizontal radius r[1] in millimetres
            A.8.3 Vertical radius r[2] in millimetres
National Annex NA (informative) Bibliography
Bibliography

Describes the requirements, dimensions, materials, the designation and testing.