![]() It was allowed to assign norms both by qualifications and by accuracy classes. ![]() The levels of relative accuracy established by the standard are not only qualifications, but also accuracy classes with the conditional names “accurate”, “medium”, “coarse” and “very coarse” (classes are formed respectively on the basis of qualifications 12, 14, 16 and 17). The norms could also be used for parts made of other materials obtained by other processing methods (shaping), if the requirements of other standards do not apply to these cases. The requirements of this standard applied to smooth metal parts processed by cutting. Limit deviations of dimensions with unspecified tolerances. Prior to the introduction of GOST 30893.1, GOST 25670 - 83 was in force, which was called “Basic norms of interchangeability.
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