Transcription of Dimensioning and Tolerancing, Section 6, Drafting …
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Drafting MANUAL Section Update 56 Dimensioning and tolerancing Page 1. Update 56 A. Wilson by: Bruce Symbols February 1997*. SYMBOLS Diameter - A diameter symbol is placed in front of any GENERAL1 dimension value that is a diameter. See Figure 2. This Section is based on ASME Symbols unique to ANSI are also described for those who are contractually obligated to comply with the older standard. Symbols permit consistency in the way dimensions and tolerances are specified, and each symbol has a clearly defined meaning. Symbols take less time to apply on a drawing than would be required to state the same requirements with words. The symbols also require considerably less space. See Figure 1. Figure 2. Diameter Symbol Counterbore Symbol - A counterbore symbol combined with a diameter symbol is placed in front of a specified counterbore or spotface diameter. See Figure 3. Figure 1. Equivalent Symbol and Note The symbols are presented in two groups for easier use of this Section as a reference.
GENIUM PUBLISHING Section 6.1 Page 3 February 1997* DRAFTING MANUAL Dimensioning and Tolerancing Update 56 Symbols * …
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