Chapter 2
Selecting a Tolerancing Approach


Readers will learn:

1. How to label a surface as a datum feature for measurements of orientation and∕or location.

2. What a datum and a datum feature are and why they are chosen.

3. How to tolerance datum features and how to relate them to one another.

4. How to calculate and assign geometric tolerances.

5. When a Simultaneous Requirement applies and what it means.

6. How to sequence a common tolerancing scheme.

7. How to read a geometric control as though it was a sentence.

  • -Datums and Datum Features
  • -Defining, Tolerancing and Qualifying Datum Features
  • -Fixed Fastener Assembly Tolerancing Formula
  • -Simultaneous Requirement Rule
  • -Reading a Feature Control Frame

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