SIST ISO 4378-3:2020 PDF

Name: SIST ISO 4378-3:2020 — Plain bearings - Terms, definitions, classification and symbols - Part 3: Lubrication
SKU: SIST ISO 4378-3:2020
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Plain bearings - Terms, definitions, classification and symbols - Part 3: Lubrication

Название (английский):

SIST ISO 4378-3:2020

Plain bearings - Terms, definitions, classification and symbols - Part 3: Lubrication

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 25
Дата публикации:: 9 июля 2020 г.
ICS:: 01.040.21
Технический комитет:: ISEL - Mechanical elements

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Описание (английский):

ISO 4378-3:2017 specifies the most commonly used terms relating to lubrication of plain bearings with their definitions and classification. For some terms and word combinations, their short forms are given, which can be used where they are unambiguous. Self-explanatory terms are given without definitions.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты SIST

Overview

SIST ISO 4378-3:2020 - Plain bearings - Terms, definitions, classification and symbols - Part 3: Lubrication is an ISO terminology standard that defines the most commonly used terms and classifications for lubrication of plain bearings. Published by ISO/TC 123 (Plain bearings), this third edition updates and harmonizes vocabulary (adding figures and editorial revisions) to reduce ambiguity in standards, technical literature and engineering practice. The document gives definitions, short forms (where unambiguous), classifications and illustrative figures; self-explanatory terms are listed without formal definitions.

Key topics and requirements

The standard primarily specifies terminology and classification rather than prescribing design parameters. Key technical topics include:

General definitions: lubrication, method of lubrication.

Classification by physical state: gas-film, liquid-film, fluid-film, solid-film lubrication.

Classification by separation mechanism:

Hydrodynamic and hydrostatic
Aerodynamic and aerostatic
Elasto-hydrodynamic (EHL) and variants: hard EHL, soft EHL, micro EHL
Boundary, mixed-film (partial-film)
Thermo-hydrodynamic (THL) and thermo-elastohydrodynamic (TEHL)

Flow regimes: laminar, transition (Taylor), turbulent.

Special conditions: starved lubrication, non-lubrication, oil-free, grease lubrication.

Methods of lubrication & periodicity:

Periodicity: continuous, periodical (including life-time prelubrication)
Renewing: recirculating, once-through
Application methods: force-feed, mechanical force-feed, dip-feed (oil-bath), drop-feed, ring, hand, splash, oil jet, oil fog/mist, pad, wick, rotaprint, solid-film coating, directed and leading-edge grooved lubrication.

Notation and short forms: commonly used abbreviations (e.g., EHL, THL, TEHL) where unambiguous.

Practical applications

SIST ISO 4378-3:2020 is a reference for anyone who needs consistent, internationally recognized vocabulary for bearing lubrication. Typical uses:

Writing unambiguous design and procurement specifications for bearings and lubrication systems.

Developing maintenance procedures, lubrication schedules and training materials.

Communicating requirements between OEMs, suppliers and test laboratories.

Assisting standards writers, technical authors and translators to ensure consistent terminology across documents.

Related standards

Other parts of the ISO 4378 series (see ISO website for the full list) and related ISO/IEC terminological resources (ISO Online Browsing Platform, IEC Electropedia) for consistent usage across standards.

Keywords: SIST ISO 4378-3:2020, plain bearings lubrication, lubrication terms, EHL, hydrodynamic lubrication, oil mist, grease lubrication, lubrication classification, lubrication methods.

SIST ISO 4378-3:2020 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Practical applications

Who should use this standard

Related standards

Технические детали

BS ISO 4378-5:2009

Plain bearings. Terms, definitions, classification and symbols. Application of symbols.

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