Artefacts represent, in near ideal form, the geometrical characteristics of gearing. These characteristics are calibrated and traceable to national artefacts. artefacts are the highest authority. They are used to set up, carry out final acceptance tests and to trace gear and spline measuring machines. There are different artefacts depending on the measuring task and the spectrum of the gearing to be measured. The closer the artefact is to the measuring task, the more certain is the traceability of the measurement.
