GD&T feature control frame
Mufaddal Rasheed 
a brief article covering the key communication tool of feature control frame in GD&T. What it means and how to interpret
The most important communication tool in GD&T is the feature control frame which communicates systematically what type and extent of geometric control is to be provided for the feature pointed and what is the reference datums .
- The geometric control symbol – indicates which type of geometric control is applied
- Geometric tolerance information Numerical value indicates the geometric tolerance applicable, accompanied by Diameter symbol to indicate tolerance zone type, The modifier indicates the geometric tolerance applied at maximum material condition only
- Primary datum
- Secondary datum
- Tertiary datum
The feature control frame along with other annotations in GD&T like basic size, size tolerance, basic dimensions together convey information on the drawing.
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Geometric Dimensioning and Tolerancing: Basics
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Categories: : GD & Tolerancing