TABLE OF CONTENTS Alex Krulikowski
Scott DeRaad
Alex Krulikowski
General Motors Corporation
Westland, MichiganA Standards manager at General Motors and a member of SME and AQC, Mr. Krulikowski has written articles for several magazines and speaks frequently at public seminars and in-house training programs. He has written 12 books on dimensioning and tolerancing, produced videotapes, computer based training, and other instructional materials. He serves on several corporate and national committees on dimensioning and tolerancing.
Scott DeRaad
General Motors Corporation
Ann Arbor, MichiganA co-author of Quick Comparison of Dimensioning Standards 1997 Edition, Mr. DeRaad is an instructor of the ASME Y14.5M-1994 GD&T standard with international teaching experience. He is an automotive automatic transmission design and development engineer for GM Powertrain. Mr. DeRaad is a cum laude graduate of the University of Michigan holding a B.S.E, Engineering-Physics.
Dimensioning standards play a critical role in the creation and interpretation of engineering drawings. They provide a uniform set of symbols, definitions, rules, and conventions for dimensioning. Without standards, drawings would not be able to consistently communicate the design intent. A symbol or note could be interpreted differently by each person reading the drawing. It is very important that the drawing user understands which standards apply to a drawing before interpreting the drawing.
Most dimensioning standards used in industry are based on either the American Society of Mechanical Engineers (ASME) or International Organization for Standardization (ISO) standards. Although these two standards have emerged as the primary dimensioning standards, there are also several other...
