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Contents
Contents
Calculating Locational Tolerances
Howard Gibson CET
2016 April 23
Contents
List of Figures
Introduction
Objective
Copyright
Change History
Modelling
Bolts
Screws
Positional Error
Fastener Configurations
Implied
Angles (Warning, Warning, Warning!)
Only Two Fasteners
Four Fastener Pattern
Datum Dimensioning
Pitch Circles
A more elaborate pitch circle model
GD&T Positional Tolerances
Positional Tolerances Using the Bolt and Screw Models
Positional Tolerances from First Principles
Bolt from First Principles
Screw From First Principles
Checking Zero Positional Tolerances
Calculations from ASME Y14.5M-1994 Appendix B
Example
Closing Remarks
Older GD&T Notes
Positional Tolerances with Zero Positional Error
Positional Tolerances for Bolts with Zero Positional Error
Positional Tolerances for Screws with Zero Positional Error
About this document ...
Angles (Warning, Warning, Warning!)