ISO 6123-3:2026

Rubber or plastics covered rollers — Specifications — Part 3: Dimensional and geometrical tolerances

This document specifies classes of dimensional and geometrical tolerances for rubber or plastics covered rollers and tests methods for the measurement of dimensions and geometries.

Cylindres revêtus de caoutchouc ou de plastique — Spécifications — Partie 3: Tolérances dimensionnelles et géométriques

General Information

• Status: Published
• Publication Date: 03-May-2026
• ICS: 83.140.99 - Other rubber and plastics products
• Technical Committee: ISO/TC 45/SC 4 - Products (other than hoses)
• Drafting Committee: ISO/TC 45/SC 4 - Products (other than hoses)
• Current Stage: 6060 - International Standard published
• Start Date: 04-May-2026
• Due Date: 05-Apr-2027
• Completion Date: 04-May-2026

Relations

• Revises: ISO 6123-3:1985 - Rubber- or plastics-covered rollers — Specifications — Part 3: Dimensional tolerances
• Effective Date: 13-Apr-2024

Overview

ISO 6123-3:2026, published by the International Organization for Standardization (ISO), defines the dimensional and geometrical tolerances for rubber or plastics covered rollers. This standard outlines tolerance classes for roller diameter, cover length, radial run-out, cylindricity, and crown, alongside standardized test methods for measurement. The document ensures clarity and uniformity in roller manufacturing-critical for industries where precise roller operation influences equipment longevity, product quality, and process reliability.

Key Topics

• Dimensional Tolerances: ISO 6123-3:2026 establishes tolerance classes for roller diameters, taking into account roller rigidity, cover hardness, and length-to-diameter ratios.
  • Classes include XP (high precision), P (precision), M (medium), and N (non-critical).
• Geometrical Tolerances: The standard covers geometric parameters such as cylindricity, crown, and radial run-out, referencing ISO 1101 for form tolerancing.
• Test Methods: Standardized procedures are described for measurement, including temperature conditioning (aligned with ISO 23529), use of suitable instruments (calipers, dial gauges, laser measurement), and specification of test pressures depending on material hardness.
• Tolerance Classes: Choice of tolerance class depends on application needs, roller type and cover hardness, with higher precision achievable by supplier-user agreement.
• Application-Specific Adaptation: Tolerances for rollers of insufficient rigidity or exceptional size must be individually agreed upon, ensuring flexibility in the standard’s application.

Applications

ISO 6123-3:2026 is essential in sectors utilizing rubber or plastics covered rollers-such as printing, packaging, textiles, paper production, and manufacturing processes. The document:

• Ensures Product Consistency: By specifying acceptable tolerance ranges, the standard mitigates variability in roller dimensions and performance, leading to consistent product quality.
• Facilitates International Trade: Conformance to an ISO standard assures customers and regulatory bodies of the reliability and interoperability of roller products across markets.
• Supports Equipment Reliability: Properly specified tolerances reduce the risk of misalignment, excessive wear, or vibration during operation, prolonging equipment life and minimizing maintenance.
• Guides Procurement and Inspection: Purchasing specifications and inspection protocols can directly reference ISO 6123-3:2026, streamlining quality assurance and compliance.
• Custom Solutions: The ability to assign different tolerance classes to different roller parameters provides manufacturers and end-users flexibility to optimize cost and performance.

Related Standards

• ISO 6123-1: Rubber- or plastics-covered rollers - Part 1: Principal dimensions and tolerances.
• ISO 1101: Geometrical product specifications (GPS) - Geometrical tolerancing - Tolerances of form, orientation, location and run-out.
• ISO 23529: Rubber - General procedures for preparing and conditioning test pieces for physical test methods.
• ISO/TR 8517: Rubber- or plastics-covered rollers - Glossary.

Practical Value

By adhering to ISO 6123-3:2026, manufacturers of covered rollers can guarantee that their products meet globally recognized standards for accuracy and quality. End-users-especially those in precision-driven sectors-benefit from clear classification and validation of roller tolerances, reducing operational risks and boosting process efficiency.

Keywords: ISO 6123-3:2026, covered rollers, dimensional tolerances, geometrical tolerances, rubber rollers, plastics rollers, quality assurance, precision manufacturing, ISO standards for rollers, roller measurement methods.

Standards Content (Sample)

International
Standard
ISO 6123-3
Second edition
Rubber or plastics covered
2026-05
rollers — Specifications —
Part 3:
Dimensional and geometrical
tolerances
Cylindres revêtus de caoutchouc ou de plastique —
Spécifications —
Partie 3: Tolérances dimensionnelles et géométriques
Reference number
ISO 6123-3:2026(en)
© ISO 2026
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 6123-3:2026(en)
Contents  Page
Foreword .iv
Introduction .v
1 Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4 Test methods . 2
4.1 Test temperature .2
4.2 Test instruments .2
4.3 Geometrical measurement .2
5  Classes of tolerances . 2
6  Dimensional tolerances on roller diameter . 3
6.1 General .3
6.2 Roller length to diameter ratio up to 15 .3
6.3 Roller length to diameter ratio between 15 and 25 .3
6.4 Other rollers .4
7  Dimensional tolerances on cover length . 4
8  Radial run-out tolerances . 4
9  Cylindricity tolerances . 5
10  Crown tolerances . 6

iii
ISO 6123-3:2026(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of 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 www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee
SC 4, Products (other than hoses).
This second edition cancels and replaces the first edition (ISO 6123-3:1985), which has been technically
revised.
The main changes are as follows:
— updating the terms and definitions;
— simplifying the classification of dimensional tolerances and geometrical tolerances.
A list of all parts in the ISO 6123 series can be found on the ISO website.
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.

iv
ISO 6123-3:2026(en)
Introduction
Covered rollers are cylindrical cores, generally of metal or carbon fibre reinforced polymer (CFRP), with
a cover of rubber or plastics for a particular use. They are manufactured in a wide variety of sizes and
hardness grades depending on the intended use.

v
International Standard ISO 6123-3:2026(en)
Rubber or plastics covered rollers — Specifications —
Part 3:
Dimensional and geometrical tolerances
1 Scope
This document specifies classes of dimensional and geometrical tolerances for rubber or plastics covered
rollers and tests methods for the measurement of dimensions and geometries.
2  Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 1101, Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form,
orientation, location and run-out
ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test methods
ISO/TR 8517:1988, Rubber- or plastics-covered rollers — Glossary
3  Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/TR 8517 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
...