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12. Practical Applications and Calculation Methods. Calculate position tolerances when more than two parts are stacked in a floating fastener or fixed fastener application. Distribute the total available position tolerance between features to which position tolerances are applied.

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12

Practical Applications and Calculation Methods

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Calculate position tolerances when more than two parts are stacked in a floating fastener or fixed fastener application.
  • Distribute the total available position tolerance between features to which position tolerances are applied.
  • Specify projected tolerance zones for fixed feature locations to prevent interference conditions.
  • Determine the amount of tolerance accumulation in a simple assembly.
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Properly use zero position tolerances at MMC to increase manufacturing freedom.
  • Apply paper gaging techniques to determine if a produced part meets drawing requirements.
zero position tolerance at mmc
Zero Position Tolerance at MMC
  • Zero tolerancing at MMC increases manufacturing freedom
  • Clearance conditions must exist
  • Located feature must have a size tolerance
  • Lets the manufacturer choose how to allocate the tolerances
paper gaging techniques
Paper Gaging Techniques
  • Measure hole locations relative to datum reference frame
  • Calculate coordinate variations
  • Calculate diameter position variations
  • Plot coordinate variation values