Rolling bearings -- Cylindrical rollers

Roulements -- Rouleaux cylindriques

General Information

Status

Published

ICS

21.100.20 - Rolling bearings

Technical Committee

ISO/TC 4/SC 5 - Needle, cylindrical and spherical roller bearings

Drafting Committee

ISO/TC 4/SC 5/WG 4 - Revision of ISO 12297-1

Current Stage

4020 - DIS ballot initiated: 5 months

Start Date

07-Sep-2018

Completion Date

07-Sep-2018

Ref Project

RELATIONS

Revised

ISO 12297:2012 - Rolling bearings -- Steel cylindrical rollers -- Dimensions and tolerances

Effective Date

14-Jul-2018

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DRAFT INTERNATIONAL STANDARD
ISO/DIS 12297-1
ISO/TC 4/SC 5 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2018-09-07 2018-11-30
Rolling bearings — Cylindrical rollers —
Part 1:
Boundary dimensions, geometrical product specifications
(GPS) and tolerance values for steel rollers
Roulements — Rouleaux cylindriques —

Partie 1: Dimensions d'encombrement, spécification géométriques des produits (GPS) et valeurs de

tolérance pour rouleaux en acier
ICS: 21.100.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 12297-1:2018(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2018
---------------------- Page: 1 ----------------------
ISO/DIS 12297-1:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018

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
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Published in Switzerland
ii © ISO 2018 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 12297‐1:2018(E)
Contents Page

Foreword ......................................................................................................................................................................... iv

Introduction ..................................................................................................................................................................... v

1 Scope .................................................................................................................................................................... 1

2 Normative references .................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................... 1

4 Symbols ............................................................................................................................................................... 2

5 Dimensions ........................................................................................................................................................ 3

6 Tolerances .......................................................................................................................................................... 8

7 Hardness ............................................................................................................................................................. 9

(informative) Roller diameter gauges and sorting principles ................................................. 10

A.1 Explanation of the terms used ................................................................................................................. 10

A.2 Roller diameter gauges and sorting principles ................................................................................. 10

(informative) Roller length tolerances, gauges and sorting principles ................................ 12

B.1 Explanation of the terms used ................................................................................................................. 12

B.2 Roller length tolerances, gauges and sorting principles ................................................................ 12

Bibliography ................................................................................................................................................................. 14

© ISO 2018 – All rights reserved
iii
---------------------- Page: 3 ----------------------
ISO/DIS 12297‐1:2018(E)
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 4, rolling bearings, Subcommittee SC 5,

Needle, cylindrical and spherical roller bearings.

This second edition cancels and replaces the first edition (ISO 12297:2012), which has been technically

revised to integrate GPS.
A list of all parts in the ISO 12297 series can be found on the ISO website.
© ISO 2018 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/DIS 12297‐1:2018(E)
Introduction

This document is a machine element geometry standard as defined in the geometrical product

[9]

specification system (GPS system) as described in the framework document of ISO 14638.

[3]

The fundamental rules of ISO GPS given in ISO 8015 apply to this document and the default decision

[7]

rules given in ISO 14253-1 apply to specifications made in accordance with this document, unless

otherwise indicated.

The connection between functional requirements, measuring technique, and measuring uncertainty is

[8]

always intended to be considered. For measurement uncertainty ISO 14253-2 is considered.

© ISO 2018 – All rights reserved
---------------------- Page: 5 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 12297-1:2018(E)
Rolling bearings — Cylindrical rollers — Part 1: Boundary
dimensions, geometrical product specifications (GPS) and
tolerance values for steel rollers
1 Scope

This document specifies dimensional and geometrical characteristics, limit deviations from nominal size

and tolerance values for finished steel cylindrical rollers for rolling bearings. The maximum roller

diameter is 40 mm.

Annexes A and B give the sorting principles for roller length tolerances and gauges, respectively

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. 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 4288, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Rules and

procedures for the assessment of surface texture
ISO 5593:1997, Rolling bearings — Vocabulary

ISO 14405-1, Geometrical product specifications (GPS) — Dimensional tolerancing — Part 1: Linear sizes

ISO/TS 17863, Geometrical product specification (GPS) — Tolerancing of moveable assemblies

3 Terms and definitions

For the purpose of this document the terms and definitions given in ISO 1101, ISO 5593, ISO 14405-1 and

the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp.
3.1
roller grade

specific combination of dimensional, form, roughness profile parameter and sorting tolerances for rollers

[SOURCE: ISO 5593:1997, 05.05.10]
© ISO 2018 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/DIS 12297‐1:2018(E)
4 Symbols
[3]

To demonstrate that the ISO GPS system, ISO 8015 , has been applied, the dimensional and geometrical

characteristics shall be included in the technical product documentation (for example, on the drawing).

The dimensional and geometrical specifications, associated to these characteristics are described in Table

1 and Figure 1.

A tolerance value associated to a characteristic is symbolized by t followed by the symbol for the

characteristic, for example t .
VDwmp

In this document, the ISO default specification operator for size is in accordance with ISO 14405-1, i.e. the

two-point size is valid.

According to ISO 8015 specifications need to be completed with Specification Operators, e.g. filtration.

These may be agreed between manufacturer and customer case by case.

Table 1 — Symbols for nominal sizes, characteristics, and specification modifiers

Symbol for Symbol
dimensions for GPS symbol and
Description
(size or character specification modifier
distance) istic
D Nominal roller diameter
Maximum of mid-range sizes of roller diameter in any
Dwmpx
cross section (only to calculate VDwL)
Difference between Dwmpx of the largest and the
VDwL
smallest roller in a lot
Range of mid-range sizes (out of two-point sizes) of
VDwmp roller diameter obtained from any cross-sections of
cylindrical part of the roller
Range of two-point sizes of roller diameter obtained
from two cross-sections B and C in a certain and
...

PROJET DE NORME INTERNATIONALE
ISO/DIS 12297-1
ISO/TC 4/SC 5 Secrétariat: AFNOR
Début de vote: Vote clos le:
2018-09-07 2018-11-30
Roulements — Rouleaux cylindriques —
Partie 1:
Dimensions d'encombrement, spécification géométrique
des produits (GPS) et valeurs de tolérance pour rouleaux
en acier
Rolling bearings — Cylindrical rollers —

Part 1: Boundary dimensions, geometrical product specifications (GPS) and tolerance values for steel

rollers
ICS: 21.100.20
CE DOCUMENT EST UN PROJET DIFFUSÉ POUR
OBSERVATIONS ET APPROBATION. IL EST DONC
SUSCEPTIBLE DE MODIFICATION ET NE PEUT
ÊTRE CITÉ COMME NORME INTERNATIONALE
AVANT SA PUBLICATION EN TANT QUE TELLE.
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES
FINS INDUSTRIELLES, TECHNOLOGIQUES ET
COMMERCIALES, AINSI QUE DU POINT DE VUE

Le présent document est distribué tel qu’il est parvenu du secrétariat du comité.

DES UTILISATEURS, LES PROJETS DE NORMES
INTERNATIONALES DOIVENT PARFOIS ÊTRE
CONSIDÉRÉS DU POINT DE VUE DE LEUR
POSSIBILITÉ DE DEVENIR DES NORMES
POUVANT SERVIR DE RÉFÉRENCE DANS LA
RÉGLEMENTATION NATIONALE.
Numéro de référence
LES DESTINATAIRES DU PRÉSENT PROJET
ISO/DIS 12297-1:2018(F)
SONT INVITÉS À PRÉSENTER, AVEC LEURS
OBSERVATIONS, NOTIFICATION DES DROITS
DE PROPRIÉTÉ DONT ILS AURAIENT
ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE. ISO 2018
---------------------- Page: 1 ----------------------
ISO/DIS 12297-1:2018(F)
ISO/DIS 12297-1:2018(F)
Sommaire Page

Avant-propos ................................................................................................................................................................. iv

Introduction ................................................................................................................................................................... iv

1 Domaine d'application ...................................................................................................................................1

2 Références normatives ..................................................................................................................................1

3 Termes et définitions .....................................................................................................................................1

4 Symboles .............................................................................................................................................................2

5 Dimensions ........................................................................................................................................................4

6 Tolérances ..........................................................................................................................................................9

7 Dureté ............................................................................................................................................................... 10

ȋ‹ˆ‘”ƒ–‹˜‡Ȍ Classes de diamètre de rouleaux et principes de classement ...................... 11

A.1 Définitions des termes utilisés ................................................................................................................ 11

A.2 Classes de diamètre de rouleaux et principes de classement ...................................................... 11

ȋ‹ˆ‘”ƒ–‹˜‡Ȍ Tolérances et classes de longueur de rouleau et principes de

classement ....................................................................................................................................................... 13

B.1 Définitions des termes utilisés ................................................................................................................ 13

B.2 Tolérances et classes de longueur de rouleau et principes de classement ............................. 13

Bibliographie ................................................................................................................................................................ 15

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© ISO 2018

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Publié en Suisse
ii © ISO 2018 – Tous droits réservés
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ISO/DIS 12297-1:2018(F)
Sommaire Page