Complimentary slides to Chris Monnier at Boston Scientific 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

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 0.1 0.1 50  0.1

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  Position Symbol Diameter Symbol Total Tolerance 25 50

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 

Profile Comparison to Linear…

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

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

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

Global Simplification of GD&T Flatness  3D Surface Control Angularity   Perpendicularity   Parallelism  Profile of a Surface Cylindricity  Total Runout Concentricity  Symmetry   2D Surface Control Straightness   Circularity  Profile of a Line Circular Runout  Axis Control Straightness  Angularity   Perpendicularity  Parallelism Position Concentricity  Symmetry 

GD&T Training Deployment Guide Beginning Operators & Technicians Customers Individuals who need to understand terminology & graphical representation of an engineering drawing. Sales & Purchasing Beginning Operators & Technicians Course I Machinists Tool Makers Senior Inspectors Senior Technicians Engineers: Associate Engineers Engineers Senior Engineers Principal Engineers Fellow Engineers Course III Drafters Inspectors Machine Operators Technical Managers Technicians: Associate Technicians Technicians Course II Supplier Technicians Supplier Engineers Receiving Inspectors Rec. Inspection Techs. Measurement Engineers Suppliers Purchasing Process Technicians Process Engineers Measurement Technicians Measurement Engineers Quality-Technicians Quality-Engineers Designers Exec. Level Manufacturing Quality/Measurement Design Tool Room Administration Sales/Applications Sales Executives Course 1: Basic Blueprint Reading Course 2: GD&T - Introduction & Fundamental Principles Course 3: GD&T – Advanced Applications & Analysis

IIGDT Public & In-House Courses Basic Blueprint Reading (1-day) To understand basic components, sections, views, terminology and graphical representation of an engineering drawing. GD&T- Introduction & Fundamental Principles (2-day) To provide fundamental lessons in proper interpretation of engineering drawings used in the design, manufacture and inspection of parts which have geometric controls applied per ANSI Y14.5M-1982 and ASME Y14.5M-1994. GD&T- Advanced Applications & Analysis (2-day) To provide advanced information in "applications and analysis“ (per ASME Y14.5M-1994 and ASME Y14.5.1M-1994) involving optimization strategies for given design applications, manufacturing methodologies and measurement implications. Public seminars scheduled quarterly at the University of Minnesota 50% Discount to Students and Professors See www.iigdt.com for details

GD&T GUIDE Charts ($12 each) available on-line at http://www.iigdt.com/id34.htm or calling IIGDT at 952-936-9499 sending and e-mail to: iigdt@bcmn.com

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