General tolerances for linear and angular dimensions without individual tolerance indications ISO 2768-1:1989

All features on component parts always have a size and a geometrical shape. For the deviation of size and for the deviations of the geometrical characteristics (form,orientation and location) the function of the part requires limitations which, when exceeded, impair this function.The tolerance on the drawing should be complete to ensure that the elements of size and geometry of all features are controlled, i.e. nothing shall be implied or left to judgement in the workshop or in the inspection department.The use of general tolerances for size and geometry simplifies the task of ensuring that this prerequisite is met.

General tolerances for linear dimensions are given in Table 1 and Table 2.
The permissible deviations of angular dimensions are given in Table 3.

Table 1 — Permissible deviations for linear dimensions except for broken edges

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