AS ISO 7129:2021 pdf download – Earth-moving machinery — Cutting edges used on tractor-dozers, graders and scrapers — Principal shapes and basic dimensions.
1  Scope This International Standard specifies — the principal shapes and dimensions of the cross-section, — the hole location for the mounting bolts, — the shapes and dimensions of holes for the mounting bolts, for cutting used on tractor-dozers, graders and scrapers, as defined in ISO 6165, taking interchangeability into consideration. NOTE  Some values in inches in this International Standard are not equivalent to the corresponding values in millimetres because widely used values have been adopted. 2  Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 6165:1997, Earth-moving machinery — Basic types — Vocabulary. 3  Cross-sections of cutting edges — Principal shapes and basic dimensions The principal shapes and basic dimensions of the cutting edge cross-section shall be as shown in figures 1 and 2 and given in tables 1 and 2.
a) for tractor-dozers and scrapers: for cutting edge of width, W, of 330 mm or less, see figure 3 a), for cutting edge of width, W, of over 330 mm, see figure 3 b); b) for graders, see table 3 and figure 4. NOTE  The shapes and dimensions of cutting edges with a 140 mm hole pitch are specified in annex A. 4.2 Each countersink shall be located within a 3,2 mm (0,125 in) diameter of the positional tolerance. 4.3 The camber of the cutting edge shall be within 2 mm/m (0,08 in/39,4 in).
5  Mounting bolt holes — Shapes and dimensions 5.1 The shapes and dimensions of mounting bolts holes shall be those shown in figure 5 and given in table 4. 5.2 The inscribed circles of the square holes shall be concentric with the countersink to within 0,8 mm (0,032 in).