Dr. Greg Hetland, President International Institute of GD&T iigdt

1. International Institute of GD&T Precision GD&T: Complimentary slides to Chris Monnier at Boston Scientific Dr. Greg Hetland, President International Institute of GD&T www.iigdt.com

2. 0.1 0.1 Plus / Minus Tolerancing This method of tolerancing allows the axis of the hole to move plus something and minus something in the X and Y direction. This creates a square tolerance zone in which the holes must lie? 4X  12.5 + 0.1 25  0.1 50  0.1

3. Total Tolerance Diameter Symbol Position Symbol Linear Transformation to GD&T Geometric Dimensioning &Tolerancing (GD&T) creates cylindrical tolerance zones by removing the tolerance from the dimensions and applying it to the features. In this example, the geometric control is position. Dimensions are basic boxed , theoretically exact, with no tolerance. 4X  12.5 + 0.1  25 50

4. Feature Control Frame Geometric Characteristic Diameter Symbol Feature Tolerance Feature Modifier Projected Tolerance Zone Symbol Height of Projected Tolerance Zone Primary Datum Secondary Datum Datum Modifier Tertiary Datum 

5. Profile Comparison to Linear… Profile Linear

6. Tolerancing Consideration #1           0 0       0 0 20±0.2 20±0.2 0 0 0.26 0.26 0.24 0.24 0.22 0.22 0.2 0.2 0.18 0.18   0.16 0.16 Only in Diagonals Only in Diagonals 0.14 0.14 0.12 0.12 0.1 0.1 0.08 0.08 0.06 0.06 0.04 0.04 0.02 0.02 0 0 20.24 19.88 19.96 20.08 20.12 20.16 20.2 19.76 19.8 19.84 19.92 20.04 19.78 19.94 20.02 20.06 20.18 20.22 19.82 19.9 19.98 20.1 20 20.14 20.26 19.74 19.86 Virtual Condition LMC MMC MMC LMC

7. Tolerancing Consideration #5                   0.26 0.26 0.24 0.24 0.22 0.22 0.2 0.2 0.18 0.18   0.16 0.16 0.14 0.14 0.12 0.12 0.1 0.1 0.08 0.08 0.06 0.06 0.04 0.04 0.02 0.02 0 0 20.24 19.88 19.96 20.08 20.12 20.16 20.2 19.76 19.8 19.84 19.92 20.04 19.78 19.94 20.02 20.06 20.18 20.22 19.82 19.9 19.98 20.1 20 20.14 20.26 19.74 19.86 Virtual Condition LMC MMC MMC LMC     0 0   0   0 0 0 20±0.2 20±0.2

8. GD&T Boundary Comparisons Orientation  Angularity  Perpendicularity Form   Parallelism Straightness Location   Flatness Position   Concentricity Circularity   Symmetry Cylindricity Runout Profile   Profile of a Surface Circular Runout   Profile of a Line Total Runout

9. Flatness  3D Surface Control  Angularity  Perpendicularity   Parallelism  Cylindricity Profile of a Surface  TotalRunout  Concentricity  Symmetry  Straightness 2D Surface Control   Circularity  CircularRunout Profile of a Line  Straightness Axis Control  Angularity   Perpendicularity  Parallelism Position  Concentricity  Symmetry

10. GD&T Fonts ($49 each) available by calling IIGDT at 952-936-9499 or sending and E-mail to: iigdt@bcmn.com