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Geometric Dimensioning & Tolerancing Training
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This calculator calculates position tolerances
utilizing principles and concepts within ASME Y14.5M - 1994, Geometric
Dimensioning and Tolerancing (GD&T).
For the equations behind this
calculator, see:
"Geometric Boundaries"
Interpretation and Application of
Geometric Dimensioning and Tolerancing
Open Calculator
This calculator will calculate the required field compensating for the effects of the fastener projection. Calculations assume a line-line case at tolerance and feature-of-size
maximum departure.
Note: All fields require an input except field being calculated.
Four (5) inputs
are required.
See the application illustration at bottom of page. The following are definitions for the elements: Fastener (Shaft) Diameter - This is the maximum size (MMC) of the bolt, shaft or other feature of size. Hole Diameter
- This is the smallest hole (MMC) for the given feature of size. Fastener (Shaft) Tolerance - The positional tolerance of the installed
bolt, screw or shaft. Hole Tolerance - This is the clearance hole positional
tolerance @ MMC. Projected Tolerance Zone - This is the distance that the fastener (shaft) extends beyond the hole which it is installed
within. This compensates for the effects of the shaft distance. (Projected tolerance zone is very important when significant shaft length must be compensated for. Thread or Shaft Engagement - This is the minimum distance of fastener or shaft engagement into the fixed component.
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