Tolerances, Engineering Design & Limits & Fits
Geometric Dimensioning & Tolerancing Training
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This calculator calculates fixed fastener 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:
Interpretation and Application of
Geometric Dimensioning and Tolerancing
Fixed Fastener Condition Calculator
Negative Tolerance numbers indicate interference.
This calculator will calculate the unknown for the given conditions. Four (4) 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.
- 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. (Calculator does not compensate for projection zone).
Hole Tolerance - This is the clearance hole positional
Clearance (C) - This is the clearance desired for the hole - fastener (shaft) when the holes are produced at a worst case positional
tolerance. This value is set to zero (0) for a line to line fit.