ASME Y14.5.1:2019 pdf download

ASME Y14.5.1:2019 pdf download.Mathematical Definition of Dimensioning and Tolerancing Principles
1.1 SCOPE
This Standard presents a mathematical definition of geometrical dimensioning and tolerancing consistent with the principles and practices of ASME Y14.5-2009, enabling determination of actual values. While the general format of this Standard parallels that of ASME Y14.5-2009, the latter document should be consulted for practices relating to dimensioning and tolerancing for use on engineering product definition and in related documentation. Textual references are included throughout this Stan- dard which are direct quotations from ASME Y14.5-2009. All such quotations are identified by italicized type and include paragraph reference within square brackets. Any direct references to other documents are identified by an immediate citation. This Standard applies to product definition in any representation. When reference is made in this Standard to anengineeringproductdefinition, itapplies to anyform of product specification. 1.1.1 Reference to Gaging This Standard is not intended as a gaging standard. Any reference to gaging is included for explanatory purposes only.
1.2 ASME Y14 SERIES CONVENTIONS
Theconventionsinparas.1.2.1 through1.2.9 areusedin this and other ASME Y14 standards.1.2.2 Cross-Reference of Standards Cross-reference of standards in text with or without a date following the standard designator shall be inter- preted as follows: (a) Reference to other ASME Y14 standards in the text withoutadatefollowingthestandarddesignatorindicates that the edition of the standard identified in the Refer- ences section (subsection 1.3) shall be used to meet the requirement. (b) Reference to other ASME Y14 standards in the text with a date following the standard designator indicates that only that edition of the standard shall be used to meet the requirement. 1.2.3 Invocation of Referenced Standards The following examples define the invocation ofa stan- dard when specified in the References section (subsection 1.3) and referenced in the text of this Stan- dard: (a) When a referenced standard is cited in the textwith no limitations to a specific subject or paragraph(s) ofthe standard, the entire standard is invoked. For example, “Dimensioning and tolerancing shall be in accordance with ASME Y14.5” is invoking the complete standard because the subject of the standard is dimensioning and tolerancing and no specific subject or paragraph(s) within the standard are invoked. (b) When a referenced standardis cited in the textwith limitations to a specific subject or paragraph(s) of the standard, only the paragraph(s) on that subject is invoked. For example, “Assign part or identifying numbers in accordance with ASME Y14.100” is invoking only the paragraph(s) on part or identifying numbers because the subject of the standard is engineering drawing practices and part or identifying numbers is a specific subject within the standard.(c) When a referenced standard is cited in the text without an invoking statement such as “in accordance with,” the standard is invoked for guidance only. For example, “For gaging principles, see ASME Y14.43” is only for guidance and no portion of the standard is invoked. 1.2.4 Parentheses Following a Definition When a definition is followed by a standard referenced in parentheses, the standard referenced in parentheses is the source for the definition. 1.2.5 Notes Notes depicted in this Standard in ALL UPPERCASE letters are intended to reflect actual drawing entries. Notes depicted in initial uppercase or lowercase letters are to be considered supporting data to the contents of this Standard and are not intended for literal entry on drawings. A statement requiring the addition of a note with the qualifier “such as” is a requirement to add a note, and the content of the note is allowed to vary to suit the application. 1.2.6 Acronyms and Abbreviations Acronyms and abbreviations are spelled out the first time used in this Standard, followed by the acronym or abbreviation in parentheses. The acronym is used there- after throughout the text. 1.2.7 Units The International System ofUnits (SI) is featured in this Standard. It should be understood that U.S. Customary units could equally have been used without prejudice to the principles established.