Background. Dimensioning and Tolerancing. Tolerance Format and Decimal Places. Converting Plus/Minus Dimensions and Tolerances into Equal Bilaterally Toleranced Dimensions. Variation and Sources of Variation. Tolerance Analysis. Worst-case Tolerance Stackups. Statistical Tolerance Stackups. Geometric Dimensioning and Tolerancing (GD&T). Converting Plus/Minus Tolerancing to Positional Tolerancing and Projected Tolerance Zones. Diametral and Radial Tolerance Stackups. Specifying Material Condition Modifiers and Their Effect on Tolerance Stackups. The Tolerance Stackup Sketch. The Tolerance Stackup Report Form. Tolerance Stackup Direction and Tolerance Stackups with Trigonometry. Putting it All Together: Tolerance Stackups with GD&T Solved Using the Advanced Dimensional Management Method. Calculating Component Tolerances Given a Final Assembly Tolerance Requirement. Floating-Fastener and Fixed-Fastener Formulas and Considerations. Fit Classifications. Form Tolerances in Tolerance Stackups. 3D Tolerance Analysis, 3D Tolerance Analysis Software, and Introduction to Six Sigma Concepts.
Biography
Bryan R. Fischer is owner of Advanced Dimensional Management LLC, which provides consulting and training in GD&T, tolerance analysis, dimensional management, 3D model-based engineering, and related fields, including 3D MBD and MBE, product documentation quality, and engineering standards. Mr. Fischer is recognized as a leading expert with more than 25 years of industrial experience in these areas. Having worked as a GD&T expert, tolerance analyst, dimensional management engineer, and design lead, he has also been a designer, checker, design drafter, and CAD systems programmer, as well as a trainer and consultant in the areas of GD&T, drawing quality, dimensional management and tolerance analysis. He trains and consults in many industries, both commercial and government, with companies ranging from very small to the largest multi-national corporations. He has consulted with inspection and CAD software developers to help them improve their implementations of GD&T, 3D PMI, and model-based product definition practices. He also works with companies around the world helping them to understand and implement 3D model-based product definition and model-based enterprise methods. Bryan has been active in the area of corporate, national, and international standards development and standards management throughout his career, and a longtime member of several standards development committees. He is a member of the American Society of Mechanical Engineers (ASME), the American Society for Quality, and SAE International. He is also an ASME Certified Senior Level GD&T Professional.
Praise for the First Edition
Written by one of the foremost authorities in the field, this reference presents proven and useful methods for determining whether selected dimensioning and tolerancing schemes will yield functional parts and assemblies. It also tells the most practical procedure to communicate the results.
—Mechanical Engineering, Vol. 126, No. 11, Nov. 2004
