The symbol on the working drawings is indicated in cases of using a standard measuring and cutting tool (reamers, broaches) and the corresponding limit gauges. Designation of tolerances and fits in the drawings. The rest of the tolerance ranges can be used in technically justified cases.īasically, the seventh grade for the hole is considered preferred.įor shafts, the sixth grade is preferred.
In order to unify products (reduce unnecessary variety), from the entire set of tolerance fields, the tolerance fields of the preferred application are highlighted, which must be used in the first place. Tolerance fields can be formed by a combination of any basic deviations with different qualities.
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