Geometric Tolerancing
Geometric tolerancing defines the allowable variation in the form, orientation, location, and runout of part features. It uses symbolic notation to specify tolerance zones that control how much a feature can deviate from its ideal geometry while still functioning correctly.
Knowledge Check
1.What is the main advantage of geometric tolerancing over traditional plus-minus dimensioning?
2.Which geometric tolerance controls how straight a line or axis must be?
3.What does the flatness tolerance control?
4.Which tolerance is used to control the roundness of a circular feature?
5.What is the difference between circularity and cylindricity?
6.Which geometric tolerance requires a datum reference?
7.What does the parallelism tolerance control?
8.Which tolerance zone is defined by two concentric circles?
9.What is a 'datum' in geometric tolerancing?
10.Which geometric characteristic controls the location of a feature relative to datums?