vii Acknowledgments Images and Prints Used in the Text Throughout the text are images and illustrations based on actual industry parts and prints supplied by valued contributors. The publisher and authors thank the following companies for their assistance in supplying images and prints for this text and previous editions: Dr. Ryan Brown would like to acknowledge and thank Dr. Louis Reifschneider of the Department of Technology at Illinois State University for his review and contributions to the content related to plastic parts. Dr. Reifschneider has experience in the plastics industry as an engineer and designer, and he gra- ciously brought his expertise to this topic. Aerojet-General AIR Corporation AISIN Manufacturing Illinois Barko Hydraulics Barton Manufacturing BC Design and Associates Bell Aerosystems Boston Gear Group Brown and Sharpe Clark Equipment Company Cleveland Gear Creatas Daimler Deere and Company DesignJet Division, Hewlett-Packard Detroit Diesel Allison Dukane Engel, Inc. GenCorp Aerojet Gleason Works Grayhill, Inc. Hydro-Gear Intermatic, Inc. Iron-A-Way J. I. Case Johnson and Towers, Inc. Kennametal Lockmasters, Inc. MAAC Machinery Marathon LeTourneau Company MASCO Corporation Master Spring and Wire Form Co. Monarch Sidney Motorola, Inc. National Lock North American Aviation OMC Lincoln Perkin Elmer Polygon Company Pratt and Whitney Canada Reed Spectrum RegO Cryo-Flow Products Rockwell Manufacturing Company Skil Corporation Sono-Mag Corporation Sperry Phoenix Company Sterling Precision Corporation Sunnen Products Company Talley Industries The American Welding Society Unidynamics Uniloy United Technologies Otis Vickers Industrial Division Wis⋅Con Total Power Corporation