Copyright Goodheart-Willcox Co., Inc. xiv Print Reading for Industry Unit 6 Section Views . . . . . . . . . . . . . . . 105 Section View Lines and Principles. . . . . . 106 Section View Types . . . . . . . . . . . . . . . . . . 107 Conventional Practice in Section Views . . 110 Other Section View Practices . . . . . . . . . . 110 Sections in Assembly Drawings . . . . . . . . 111 Computer-Generated Section Views . . . . . 112 Unit 7 Auxiliary Views . . . . . . . . . . . . . 129 Auxiliary View Principles and Purposes. . 130 Visualizing Auxiliary Views . . . . . . . . . . . 132 Auxiliary View Types . . . . . . . . . . . . . . . . 133 Computer-Generated Auxiliary Views . . . 134 Unit 8 Screw Thread Representation . 149 Thread Terms and Definitions . . . . . . . . . . 150 Screw Thread Forms . . . . . . . . . . . . . . . . . 151 Thread Representations . . . . . . . . . . . . . . 151 Thread Characteristics. . . . . . . . . . . . . . . 153 Specification of Screw Threads. . . . . . . . 155 Metric Threads. . . . . . . . . . . . . . . . . . . . . . 157 Pipe Threads . . . . . . . . . . . . . . . . . . . . . . 158 Computer-Generated Thread Representations. . . . . . . . . . . . . . . . . 159 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . 159 Section Three Fundamentals of Size Description and Annotations Unit 9 Dimensioning . . . . . . . . . . . . . . . 173 Dimensioning Mechanics. . . . . . . . . . . . . . 174 Dimensioning Rules of Choice and Placement . . . . . . . . . . . . . . . . . . . . . 177 Additional Dimensioning Techniques. . . . 180 Notes and Special Features . . . . . . . . . . 182 Digital Product Definition . . . . . . . . . . . . . 182 Undimensioned Drawings . . . . . . . . . . . . 183 Unit 10 Tolerancing . . . . . . . . . . . . . . . . . 199 Tolerancing Terms . . . . . . . . . . . . . . . . . . 200 American Standard Tolerances . . . . . . . . 204 Metric Tolerances and Fits. . . . . . . . . . . . 204 Tolerancing Methods . . . . . . . . . . . . . . . . 205 Unit 11 Machining Specifi cations and Drawing Notes . . . . . . . . . . . . 217 Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218 Holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218 Common Machining Operations . . . . . . . 221