SIST ISO 6525:2020
(Main)Plain bearings - Ring type thrust washers made from strip - Dimensions and tolerances
Plain bearings - Ring type thrust washers made from strip - Dimensions and tolerances
This document specifies a range of ring type thrust washers for general purpose use with wrapped bushes as specified in ISO 3547 (all parts).
It applies to thrust washers having inside diameters from 6 to 80 mm.
NOTE It is not expected that all the sizes listed will be available from stock but the standardization of sizes is aimed at making economies in tooling costs.
Paliers lisses - Rondelles de butée faites à partir de matériaux en bande - Dimensions et tolérances
Drsni ležaji - Kolobarjasta oporna podloga, izdelana iz traku - Mere in tolerance
General Information
- Status
- Published
- Publication Date
- 10-Jun-2020
- Technical Committee
- ISEL - Mechanical elements
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 11-Mar-2020
- Due Date
- 16-May-2020
- Completion Date
- 11-Jun-2020
Relations
- Effective Date
- 04-Nov-2015
Overview - ISO 6525:2018 (Plain bearings, ring type thrust washers)
ISO 6525:2018 specifies the dimensions and tolerances for ring type thrust washers made from strip, intended for general‑purpose use with wrapped bushes as specified in ISO 3547. The standard covers unsplit ring thrust washers that fit into a housing recess to accept axial thrust and provide axial location for a rotating shaft. It applies to washers with inside diameters from 6 mm to 80 mm and is aimed at harmonizing sizes to reduce tooling costs (not all sizes are necessarily stocked).
Key topics and technical requirements
- Scope and definitions - Clear terms (e.g., ring type thrust washer) and symbolic notation for size parameters.
- Dimensions and tolerances - Standardized nominal values for inside/outside diameters, washer thickness, pitch circle and dowel hole positions; tolerances are specified (including reference to fits such as G10 for certain diameters).
- Recess and location - Washers are normally located in a housing recess and retained against rotation by a dowel (alternatively lug or tab). Recess corners should be sharp or undercut to avoid interference with washer corners.
- Oil grooves - Provision for oil grooves by agreement between user and manufacturer. Grooves primarily feed lubricant; typical grooving arrangements are illustrated. For bimetallic linings, groove depth should preferably be less than the lining thickness. Sharp groove edges must be removed.
- Flatness - Ungrooved washers must meet a flatness requirement: they shall slide between parallel plates set at e + p, where p = 0.10 mm for washers up to 80 mm outside diameter and p = 0.12 mm above that size. Flatness is not specified for grooved washers due to distortion from grooving.
- Edges and finishing - All sharp edges shall be removed; finishing and deburring requirements are stated to ensure assembly safety and fit.
Applications and who uses this standard
ISO 6525:2018 is relevant to:
- Bearing manufacturers and fabricators of plain bearings and thrust washers
- Design and mechanical engineers specifying thrust surfaces in rotating machinery
- OEMs in automotive, industrial gearboxes, pumps, compressors and agricultural equipment
- Purchasing and quality assurance teams ensuring interchangeability and correct tolerances
- Toolmakers and production planners aiming to standardize tooling and reduce costs
Practical benefits include improved interchangeability with wrapped bushes (ISO 3547), predictable assembly fits, simplified procurement, and lower tooling/production costs.
Related standards
- ISO 3547 (all parts) - Wrapped bushes (explicitly referenced for compatibility)
- Prepared by ISO/TC 123 (Plain bearings), Subcommittee SC 3 (Dimensions, tolerances and construction details)
Keywords: ISO 6525:2018, plain bearings, ring type thrust washers, dimensions and tolerances, wrapped bushes, ISO 3547, oil grooves, flatness, dowel, thrust washers.
Frequently Asked Questions
SIST ISO 6525:2020 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Plain bearings - Ring type thrust washers made from strip - Dimensions and tolerances". This standard covers: This document specifies a range of ring type thrust washers for general purpose use with wrapped bushes as specified in ISO 3547 (all parts). It applies to thrust washers having inside diameters from 6 to 80 mm. NOTE It is not expected that all the sizes listed will be available from stock but the standardization of sizes is aimed at making economies in tooling costs.
This document specifies a range of ring type thrust washers for general purpose use with wrapped bushes as specified in ISO 3547 (all parts). It applies to thrust washers having inside diameters from 6 to 80 mm. NOTE It is not expected that all the sizes listed will be available from stock but the standardization of sizes is aimed at making economies in tooling costs.
SIST ISO 6525:2020 is classified under the following ICS (International Classification for Standards) categories: 21.100.10 - Plain bearings. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST ISO 6525:2020 has the following relationships with other standards: It is inter standard links to SIST ISO 6525:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST ISO 6525:2020 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2020
Drsni ležaji - Kolobarjasta oporna podloga, izdelana iz traku - Mere in tolerance
Plain bearings - Ring type thrust washers made from strip - Dimensions and tolerances
Paliers lisses - Rondelles de butée faites à partir de matériaux en bande - Dimensions et
tolérances
Ta slovenski standard je istoveten z: ISO 6525:2018
ICS:
21.100.10 Drsni ležaji Plain bearings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 6525
Second edition
2018-07
Plain bearings — Ring type thrust
washers made from strip —
Dimensions and tolerances
Paliers lisses — Rondelles de butée faites à partir de matériaux en
bande — Dimensions et tolérances
Reference number
©
ISO 2018
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and units . 2
5 Dimensions and tolerances . 2
6 OiI grooves . 3
7 Flatness of washer . 3
8 Edges . 3
Bibliography . 7
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 3,
Dimensions, tolerances and
...
INTERNATIONAL ISO
STANDARD 6525
Second edition
2018-07
Plain bearings — Ring type thrust
washers made from strip —
Dimensions and tolerances
Paliers lisses — Rondelles de butée faites à partir de matériaux en
bande — Dimensions et tolérances
Reference number
©
ISO 2018
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and units . 2
5 Dimensions and tolerances . 2
6 OiI grooves . 3
7 Flatness of washer . 3
8 Edges . 3
Bibliography . 7
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 3,
Dimensions, tolerances and construction details.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
This second edition cancels and replaces the first edition (ISO 6525:1983), which has been technically
revised.
...
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