From the course: Introduction to Geometric Dimensioning and Tolerancing

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Verification and validation of final part specs

Verification and validation of final part specs

From the course: Introduction to Geometric Dimensioning and Tolerancing

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Verification and validation of final part specs

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- [Instructor] For simple surfaces, geometric tolerances can sometimes be evaluated with a dial indicator. For example, the flatness of a surface can be indicated by mounting a dial indicator above a surface plate, and moving it parallel to what the perfect surface should be, while the part is held fixtured to that surface plate. This technique can prove difficult for more complex parts, so other methods should be considered. One of the most direct methods to verify the tolerance of a part, is through the fabrication and use of a go gauge, or a no-go gauge. The go or no-go gauge is designed to mate with the manufactured part. Any feature of the manufactured part that is outside of the specified tolerance zone, will prevent mating with the gauge. The gauge must be fabricated more precisely then the part being evaluated. Typically, gauge tolerances will be 10% of the tolerance given for the manufactured part being evaluated. Another common method for verifying the geometry of a…

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