ISO 4378-4:2009

Plain bearings — Terms, definitions, classification and symbols — Part 4: Basic symbols ISO 4378-4:2009

General information

90.93 Standard confirmed   Aug 4, 2022

ISO

ISO/TC 123/SC 6 Terms and common items

International Standard

21.100.10   Plain bearings | 01.040.21   Mechanical systems and components for general use (Vocabularies)

Scope

ISO 4378-4:2009 defines basic symbols for use in the field of plain bearings. Additional signs are also defined for use as superscripts and subscripts.
The characters employed are drawn from the Latin and Greek alphabets, Arabic numerals and other signs, for example points, commas, horizontal lines or asterisks. In the simplest case, an application symbol consists of the basic character alone; in the most complex, of the basic character with subscripts and superscripts (additional signs). For the purposes of international applicability, all basic symbols and additional signs have been derived from English words, and designations used in technical literature up to now have been adopted as far as possible. Wide conformity of the symbols for all types of plain bearings has been attempted.
This classification is established for use in calculations and technological and geometrical determinations, as well as in the quality assurance of plain bearings.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 4378-4:1997

WITHDRAWN
ISO 7904-1:1995

NOW

PUBLISHED
ISO 4378-4:2009
90.93 Standard confirmed
Aug 4, 2022