ISO 16249:2013 pdf free

ISO 16249:2013 pdf free.Springs – Symbols
This International Standard specifies general principles for the creation of symbols of physical quantities,coefficients, and parameters for metal springs. Itspecifies the presentation ofbasic characters, subscripts,and application symbols for use in the field of helical compression springs, helical extension springs,helical torsion springs, flat springs, and leaf springs with attention to technical product documentation,especially for describing and ordering.
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 26909, Springs一Vocabulary
ISO 80000-1, Quantities and units一Part 1: General
ISO 80000-4, Quantities and units一Part 4: Mechanics
For the purpose of international applicability, all basic characters and subscripts should be derived from English words, and designations used in technical literature up to the time of publication of this International Standard are adopted as far as possible. Wide conformity of the symbols for springs has been attempted.
The characters that are permitted to be used for spring symbols are Latin letters (upper case or lower case), Greek letters (upper case or lower case), and Arabic numbers.
NOTE 1 As there is a risk of confusion with the Arabic number 0, the following Latin letters have not been specified: 0 upper case letter), 0 (lower case letter).
NOTE 2 As there is a risk of confusion with Latin letters, the following Greek letters have not been specified:A,B,E,Z, H,I,K,K,M,N,O,o,P,T, r and X.
In the case of subscripts consisting of a single character, upper case letters should be used basically.When a subscript consists of a single character and the upper case letter of this character is already used for an existing symbol, the lower case letter may be used.
When an upper case letter is used as a basic character, the corresponding subscript should be the upper case letter.
When a lower case letter is used as a basic character, the corresponding subscript should be the lower case letter.
In the case of subscripts consisting of two or three characters, lower case letters should be used basically.ISO 16249 pdf download.