Inspect GD&T Tolerances

Geometric dimensioning and tolerancing in ZEISS INSPECT

What are GD&T tolerances?

GD&T tolerances allow for determining and assessing geometrical deviations of parts. They describe the maximum permissible deviations from the nominal state of a part. If GD&T tolerances are exceeded, the function, accuracy of fit or form of the part is not fulfilled. The tolerances can be used to determine whether a bore hole is manufactured to fit exactly, whether it has the correct direction or whether existing form errors are within the permissible limits, for example. GD&T tolerances are used throughout all steps of the process chain, such as design, production and quality control.

Possible causes for GD&T deviations are, for example:

  • Deformation during processing
  • Wear and tear of the tool
  • Machine vibration
  • Temperature fluctuations during processing

GD&T functions in ZEISS INSPECT

While GD&T tolerances are used for specification in design, they help the metrologist to verify a part. The basic prerequisite for efficient evaluation is full-field measuring data generated by optical measurement technology. ZEISS INSPECT includes several GD&T functions for a comprehensive analysis of dimensions, form and position by means of datum systems, fitting elements and tolerances. The parametric design of the ZEISS INSPECT additionally supports and facilitates GD&T analyses. For measuring and analyzing the individual elements, this means that every element only has to be constructed once and can then be used as a reference. The respective computation method is set automatically.

Your advantages

  • Visualization of labels conforming to ISO standards

    ZEISS INSPECT enables you to visualize GD&T tolerances in accordance with the ISO standard. This allows you to add results to a visualization that is very similar to the technical drawing or CAD data.

  • Detect errors in time

    ZEISS INSPECT provides you with a project guide that guides you through your project. This allows you to detect calculation errors in time. The software also suggests suitable solutions.

  • Component testing with PMI support

    GD&T can help achieve 100 % certainty in OK/NOK decisions, making it suitable for automation and digitalization applications, such as product and manufacturing information (PMI).

Even more ZEISS INSPECT functions

We have clearly summarized the most popular functions of ZEISS INSPECT for you here:
From CAD import to various inspections and reporting. Do you already know them all?