BS ISO 11687-3-2020 PDF

Full title and description

STB BS ISO 11687-3-2020 — Plain bearings — Pedestal plain bearings — Part 3: Centre flange bearings. This entry refers to the BS adoption of the international standard ISO 11687-3:2020; the title shown (STB BS ISO. .) is used in some national catalogues and resellers to indicate a national listing of the BS/ISO document.

Abstract

This part of ISO 11687 specifies design characteristics for centre flange (centre‑flange) pedestal plain bearings for the size range 9 to 28 and provides associated design characteristics for mating shafts. It is intended primarily for bearings used in electrical and turbo engineering applications.

General information

• Status: Published / Active (International Standard confirmed).
• Publication date: April 2020 (ISO edition 2 — 2020; national adoption as BS ISO 11687-3:2020 published by BSI in April 2020).
• Publisher: International Organization for Standardization (ISO); identical national adoption published by British Standards Institution (BSI) as BS ISO 11687-3:2020.
• ICS / categories: 21.100.10 (Plain bearings).
• Edition / version: Edition 2 (2020).
• Number of pages: ISO metadata lists 10 pages for the ISO document; some national/British publications list 18 pages (BS publication sometimes includes national foreword/cover pages). Note the page count shown can vary by publisher/format.

Scope

This part of ISO 11687 establishes dimensional and design characteristics for centre flange pedestal plain bearings for sizes 9 to 28 and gives the corresponding shaft design information required for correct fit and function. The standard is intended for bearings used mainly in electrical and turbo engineering industries and is part of the ISO 11687 series covering pedestal plain bearings (pillow blocks, side flange and centre flange types).

Key topics and requirements

• Design characteristics and dimensional data for centre flange pedestal plain bearings (size range 9–28).
• Design characteristics and recommended dimensions/tolerances for mating shafts and thrust collars.
• Classification, designation and material considerations for bearings in the specified size range.
• Normative references and related tolerance standards (for example ISO 12129 series for fits and tolerances referenced by the part).
• Applicability to electrical and turbo engineering equipment where these bearing types are commonly used.

Typical use and users

Design and mechanical engineers, bearing manufacturers, procurement and quality assurance personnel, and maintenance engineers working on electrical machines, turbines and related rotating equipment typically use this standard to select, specify and verify pedestal centre flange plain bearings and associated shaft features.

Related standards

ISO 11687 series (other parts include Part 1 — Pillow blocks and Part 2 — Side flange bearings), ISO 12129 (tolerances and fits for plain bearings), and other dimensional/tolerance standards referenced in the normative references. The BS adoption (BS ISO 11687-3:2020) is identical in technical content to ISO 11687-3:2020.

Keywords

plain bearings; pedestal bearings; centre flange bearings; flange bearings; pillow block; shaft design; dimensions; tolerances; ISO 11687; BS ISO 11687-3:2020.

FAQ

Q: What is this standard?

A: It is ISO 11687-3:2020 (published as BS ISO 11687-3:2020 in the UK) — the part of the ISO 11687 series that specifies design and dimensional characteristics for centre flange pedestal plain bearings.

Q: What does it cover?

A: Design characteristics, dimensional data and shaft design guidance for centre flange pedestal plain bearings in the nominal size range 9 to 28, with application focus on electrical and turbo engineering equipment.

Q: Who typically uses it?

A: Bearing designers and manufacturers, machine designers, procurement/specification teams, and maintenance/quality engineers who need consistent dimensions and fits for pedestal centre flange plain bearings.

Q: Is it current or superseded?

A: The 2020 edition (edition 2) supersedes the earlier 1995 edition; it is the current published edition (ISO/TC 123/SC 3 confirmed the 2020 edition).

Q: Is it part of a series?

A: Yes — ISO 11687 is a multi‑part series covering pedestal plain bearings (Part 1: Pillow blocks; Part 2: Side flange bearings; Part 3: Centre flange bearings). Use the related parts for other pedestal bearing types and the referenced tolerance standards (e.g., ISO 12129) for fits and shaft tolerances.

Q: What are the key keywords?

A: Plain bearings, pedestal bearings, centre flange, flange bearings, shaft dimensions, tolerances, ISO 11687, BS ISO.