ISO 6811-1998 PDF

Full title and description

ISO 6811:1998 — Spherical plain bearings — Vocabulary. This International Standard defines general terms and definitions used for spherical plain bearings, bearing parts and features, movements and angles, and rod ends; it also includes equivalent terms in additional languages where published.

Abstract

ISO 6811:1998 provides a standardized vocabulary for spherical plain bearings to ensure clear, consistent terminology across design, manufacture, specification and testing of these components. The document covers terms for bearings and their parts, allowable movements and angles, and related rod-end components; a corrigendum was published in 1999.

General information

• Status: Published (current edition confirmed by ISO reviews).
• Publication date: October 1998 (Edition 2).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 01.040.21; 21.100.10.
• Edition / version: Edition 2 (1998).
• Number of pages: 42.

Key bibliographic and lifecycle details (status, edition, publication date, page count) are recorded on the ISO catalogue; a technical corrigendum (ISO 6811:1998/Cor 1:1999) was issued to correct the published text.

Scope

Defines and harmonizes terms and definitions related to spherical plain bearings: the bearing elements themselves, individual parts and features (rings, seats, liners), movements (rotational, oscillatory, tilting), relevant angles and clearances, and rod-end types and terminology. The standard supplies authoritative wording to be used in specifications, drawings and technical communications for spherical plain bearings.

Key topics and requirements

• Standardized terminology for spherical plain bearings and related components (inner/outer rings, liners, housings).
• Definitions of types of movement and misalignment (angular, oscillatory, rotational) relevant to spherical bearings.
• Terms for dimensional features, fits and clearances used in bearing specification.
• Vocabulary for rod ends and bearing-mounted hardware commonly used with spherical plain bearings.
• Language/translation note: official ISO languages are authoritative; other-language equivalents may be included by member bodies.

Typical use and users

Used by design and application engineers, bearing manufacturers, procurement/specification teams, test laboratories, technical authors and standards committees to ensure consistent terminology in drawings, datasheets, test procedures and contract documents for machinery, hydraulic/pneumatic cylinders, automotive, aerospace and industrial equipment.

Related standards

ISO 6811:1998 is part of the spherical plain bearings subject area and is commonly used alongside dimensional and product standards such as the ISO 12240 series (e.g., ISO 12240‑1:1998 for radial spherical plain bearings and ISO 12240‑4:1998 for spherical plain bearing rod ends). It is also used with mounting-dimension standards for rod-end eyes in pneumatic/hydraulic applications (for example, the ISO 8139 series).

Keywords

spherical plain bearings; vocabulary; terminology; rod ends; bearing parts; movements; angular misalignment; inner ring; outer ring; clearances.

FAQ

Q: What is this standard?

A: ISO 6811:1998 is an ISO vocabulary standard that defines terms and definitions used for spherical plain bearings and related components.

Q: What does it cover?

A: It covers standardized terminology for bearings, bearing parts and features, movements and angles, and rod ends so that specifications, drawings and technical documents use consistent wording. A technical corrigendum was published in 1999 to correct parts of the published text.

Q: Who typically uses it?

A: Designers, bearing manufacturers, test labs, standards writers, procurement/specification teams and maintenance engineers who need consistent, unambiguous terminology for spherical plain bearings and associated hardware.

Q: Is it current or superseded?

A: The 1998 edition (Edition 2) of ISO 6811 is published and has been subject to ISO systematic reviews; ISO records show the edition and its corrigendum (1999) and indicate confirmation during periodic reviews. Users should check the ISO catalogue or their national standards body for the absolute current status before formal citation.

Q: Is it part of a series?

A: Yes — ISO 6811 (vocabulary) complements the ISO series of spherical plain bearing product and dimensional standards such as ISO 12240 (parts covering radial bearings and rod ends) and other application-related standards. These documents are intended to be used together when specifying or manufacturing spherical plain bearings and rod ends.

Q: What are the key keywords?

A: Spherical plain bearings, rod ends, bearing vocabulary, terminology, bearings parts, misalignment, sliding elements, inner/outer ring.