GD&T Fixed Fastener Condition Projected Tolerance Zone Compensation

Tolerances, Engineering Design & Limits & Fits

Geometric Dimensioning & Tolerancing GD&T Training

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This calculator calculates  position tolerances utilizing principles and concepts withinASME Y14.5-2009 and 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

GD&T Fixed Fastener Condition Projected Tolerance Zone Compensation 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.

GD&T Fixed Fastener Condition Projected Tolerance Zone Compensation Calculator

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