SN EN 10243-1 : 1999 CORR 2005

      Foreword
1 Scope
2 Normative References
3 Symbols
4 Information required in determining tolerances
      4.1 Mass of forging
      4.2 Shape of die line
      4.3 Category of steel used
      4.4 Shape complexity factor
      4.5 Types of dimensions
5 Categories of tolerances
      5.1 Scope of categories
      5.2 Definition of categories
      5.3 Deviations of form
6 Use of tables
      6.1 Tables 1 and 2: Tolerances for length, width
                              and height, residual flash
                              (and trimmed flat), and
                              mismatch
      6.2 Tables 3 and 4: Tolerances for thickness and
                              ejector marks
      6.3 Table 5: Tolerances for straightness, flatness
                       and tolerances for centre-to-centre
                       dimensions
      6.4 Table 6: Tolerances for fillet and edge radii;
                       tolerances for burrs; tolerances for
                       sheared ends
7 Design procedure
      7.1 Information required by the forger
      7.2 Preparation of forging drawing
      7.3 Indication of dimensions on forging drawing
      7.4 Indication of tolerances on forging drawings
      7.5 Importance of forging drawing
Annex A (informative) Examples of application

Defines the dimensional tolerances for steel drop and vertical press forgings made under hammers and presses.