Spherical True Position GD&T Tolerance Equations and Application

Spherical True Position Tolerance Calculator

Tolerances, Engineering Design & Limits & Fits

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This calculator calculates position tolerances utilizing principles and concepts within ASME 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

Open Spherical True Position Calculator

This calculator will convert coordinate measurements to position tolerances. Three (3) inputs are required, See the application illustration at bottom of page.

The following are definitions for the elements:

X Offset - This is the difference between the basic dimension (Drawing) and the actual measurement of the produced part in the X axis direction.

Y Offset - This is the difference between the basic dimension (Drawing) and the actual measurement of the produced part in the Y axis direction.

Z Offset - This is the difference between the basic dimension (Drawing) and the actual measurement of the produced part in the Z axis direction.

Calculated (ACTUAL) Radius True Position - The calculated radius offset
see Spherical True Position Calculator .

Calculated (ACTUAL) Spherical True Position - The calculated spherical positional tolerance diameter zone (2 x R).

The calculated spherical Coordinate System

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