Specification by tolerance zone
Errors of shape, position, orientation and beat. part 1

• Principle

  As mentioned earlier, during the design phase, the engineering firm responsible for defining a product must anticipate, for each component of the mechanism, the dimensional and geometric tolerances compatible with the various technical functions they perform. The design drawing must therefore include specifications that reflect these functional requirements.

• Note on a drawing (NF E 04-552) (ISO 1101)

Geometric specifications are indicated on a drawing using a table connected to the specified feature by an arrow (Figure