Rolling bearings — Dynamic load ratings and rating life — Discontinuities in the calculating of basic dynamic load ratings

Roulements — Charges dynamiques de base et durée nominale — Discontinuité dans le calcul des charges dynamiques de base

Kotalni ležaji - Dinamična nosilnost in življenjska doba - Različnosti pri izračunu dinamične nosilnosti

General Information

Status
Withdrawn
Publication Date
15-Dec-1999
Withdrawal Date
15-Dec-1999
Current Stage
9599 - Withdrawal of International Standard
Start Date
22-Feb-2007
Completion Date
22-Feb-2007

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TECHNICAL ISO/TS
SPECIFICATION 16799
First edition
1999-12-15
Rolling bearings — Dynamic load ratings
and rating life — Discontinuities in the
calculating of basic dynamic load ratings
Roulements — Charges dynamiques de base et durée nominale —
Discontinuité dans le calcul des charges dynamiques de base
Reference number
ISO/TS 16799:1999(E)
ISO 1999
---------------------- Page: 1 ----------------------
ISO/TS 16799:1999(E)
PDF disclaimer

This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not

be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this

file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this

area.
Adobe is a trademark of Adobe Systems Incorporated.

Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters

were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event

that a problem relating to it is found, please inform the Central Secretariat at the address given below.

© ISO 1999

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic

or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body

in the country of the requester.
ISO copyright office
Case postale 56 � CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 734 10 79
E-mail copyright@iso.ch
Web www.iso.ch
Printed in Switzerland
ii © ISO 1999 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/TS 16799:1999(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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted

by the technical committees are circulated to the member bodies for voting. Publication as an International

Standard requires approval by at least 75 % of the member bodies casting a vote.

In other circumstances, particularly when there is an urgent market requirement for such documents, a technical

committee may decide to publish other types of normative document:

� an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in an

ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the

parent committee casting a vote;

� an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical

committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a

vote.

An ISO/PAS or ISO/TS is reviewed every three years with a view to deciding whether it can be transformed into an

International Standard.

Attention is drawn to the possibility that some of the elements of this Technical Specification may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO/TS 16799 was prepared by Technical Committee ISO/TC 4, Rolling bearings, Subcommittee SC 8, Load

ratings and life.
© ISO 1999 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/TS 16799:1999(E)
Introduction

This Technical Specification addresses discontinuities in the calculation of basic dynamic load ratings for radial and

thrust angular-contact ball bearings.

The factors used in calculating the basic dynamic load ratings C and C according to ISO 281 are slightly different

r a

for radial and thrust angular-contact ball bearings. The methods for taking into account the influence of thrust loads

on bearing life are also different.

Therefore there is a discontinuity in the calculated lives when a bearing with the contact angle � =45° is first

regarded as a radial bearing and then as a thrust bearing. In both cases the bearing is subject to the same external

axial load F only.
iv © ISO 1999 – All rights reserved
---------------------- Page: 4 ----------------------
TECHNICAL SPECIFICATION ISO/TS 16799:1999(E)
Rolling bearings — Dynamic load ratings and rating life —
Discontinuities in the calculating of basic dynamic load ratings
1 Scope

This Technical Specification explains why the load rating factors for calculation of the basic dynamic load ratings C

and C are different for radial and thrust angular-contact ball bearings, and shows how these load ratings can be

recalculated in order to bring about correct comparisons under the same conditions.

2 Normative reference

The following normative document contains provisions which, through reference in this text, constitute provisions of

this Technical Specification. For dated references, subsequent amendments to, or revisions of, this publication do

not apply. However, parties to agreements based on this Technical Specification are encouraged to investigate the

possibility of applying the most recent edition of the normative document indicated below. For undated references,

the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of

currently valid International Standards.
ISO 281:1990, Rolling bearings — Dynamic load ratings and rating life.
3 Symbols

For the purposes of this Technical Specification the symbols used in ISO 281 as well as the following apply.

C wh
...

SLOVENSKI STANDARD
SIST ISO/TS 16799:2001
01-julij-2001

.RWDOQLOHåDML'LQDPLþQDQRVLOQRVWLQåLYOMHQMVNDGRED5D]OLþQRVWLSULL]UDþXQX

GLQDPLþQHQRVLOQRVWL

Rolling bearings -- Dynamic load ratings and rating life -- Discontinuities in the calculating

of basic dynamic load ratings

Roulements -- Charges dynamiques de base et durée nominale -- Discontinuité dans le

calcul des charges dynamiques de base
Ta slovenski standard je istoveten z: ISO/TS 16799:1999
ICS:
21.100.20 Kotalni ležaji Rolling bearings
SIST ISO/TS 16799:2001 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST ISO/TS 16799:2001
---------------------- Page: 2 ----------------------
SIST ISO/TS 16799:2001
TECHNICAL ISO/TS
SPECIFICATION 16799
First edition
1999-12-15
Rolling bearings — Dynamic load ratings
and rating life — Discontinuities in the
calculating of basic dynamic load ratings
Roulements — Charges dynamiques de base et durée nominale —
Discontinuité dans le calcul des charges dynamiques de base
Reference number
ISO/TS 16799:1999(E)
ISO 1999
---------------------- Page: 3 ----------------------
SIST ISO/TS 16799:2001
ISO/TS 16799:1999(E)
PDF disclaimer

This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not

be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this

file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this

area.
Adobe is a trademark of Adobe Systems Incorporated.

Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters

were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event

that a problem relating to it is found, please inform the Central Secretariat at the address given below.

© ISO 1999

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic

or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body

in the country of the requester.
ISO copyright office
Case postale 56 � CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 734 10 79
E-mail copyright@iso.ch
Web www.iso.ch
Printed in Switzerland
ii © ISO 1999 – All rights reserved
---------------------- Page: 4 ----------------------
SIST ISO/TS 16799:2001
ISO/TS 16799:1999(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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted

by the technical committees are circulated to the member bodies for voting. Publication as an International

Standard requires approval by at least 75 % of the member bodies casting a vote.

In other circumstances, particularly when there is an urgent market requirement for such documents, a technical

committee may decide to publish other types of normative document:

� an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in an

ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the

parent committee casting a vote;

� an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical

committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a

vote.

An ISO/PAS or ISO/TS is reviewed every three years with a view to deciding whether it can be transformed into an

International Standard.

Attention is drawn to the possibility that some of the elements of this Technical Specification may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO/TS 16799 was prepared by Technical Committee ISO/TC 4, Rolling bearings, Subcommittee SC 8, Load

ratings and life.
© ISO 1999 – All rights reserved iii
---------------------- Page: 5 ----------------------
SIST ISO/TS 16799:2001
ISO/TS 16799:1999(E)
Introduction

This Technical Specification addresses discontinuities in the calculation of basic dynamic load ratings for radial and

thrust angular-contact ball bearings.

The factors used in calculating the basic dynamic load ratings C and C according to ISO 281 are slightly different

r a

for radial and thrust angular-contact ball bearings. The methods for taking into account the influence of thrust loads

on bearing life are also different.

Therefore there is a discontinuity in the calculated lives when a bearing with the contact angle � =45° is first

regarded as a radial bearing and then as a thrust bearing. In both cases the bearing is subject to the same external

axial load F only.
iv © ISO 1999 – All rights reserved
---------------------- Page: 6 ----------------------
SIST ISO/TS 16799:2001
TECHNICAL SPECIFICATION ISO/TS 16799:1999(E)
Rolling bearings — Dynamic load ratings and rating life —
Discontinuities in the calculating of basic dynamic load ratings
1 Scope

This Technical Specification explains why the load rating factors for calculation of the basic dynamic load ratings C

and C are different for radial and thrust angular-contact ball bearings, and shows how these load ratings can be

recalculated in order to bring about correct comparisons under the same conditions.

2 Normative reference

The following normative document contains provisions which, through reference in this text, constitute provisions of

this Technical Specification. For dated references, subsequent amendments to, or revisions of, this publication do

not apply. However, parties to agreements based on this Technical Specification are encouraged

...

SPÉCIFICATION ISO/TS
TECHNIQUE 16799
Première édition
1999-12-15
Roulements — Charges dynamiques de
base et durée nominale — Discontinuité
dans le calcul des charges dynamiques de
base
Rolling bearings — Dynamic load ratings and rating life — Discontinuities
in the calculating of basic dynamic load ratings
Numéro de référence
ISO/TS 16799:1999(F)
ISO 1999
---------------------- Page: 1 ----------------------
ISO/TS 16799:1999(F)
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fichier; les paramètres de création PDF ont été optimisés pour l'impression. Toutes les mesures ont été prises pour garantir l'exploitation de

ce fichier par les comités membres de l'ISO. Dans le cas peu probable où surviendrait un problème d'utilisation, veuillez en informer le

Secrétariat central à l'adresse donnée ci-dessous.
© ISO 1999

Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque

forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l’ISO à

l’adresse ci-après ou du comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 56 � CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax. + 41 22 734 10 79
E-mail copyright@iso.ch
Web www.iso.ch
ImpriméenSuisse
ii © ISO 1999 – Tous droits réservés
---------------------- Page: 2 ----------------------
ISO/TS 16799:1999(F)
Avant-propos

L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux de

normalisation (comité membres de l'ISO). L'élaboration des Normes internationales est en général confiée aux

comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire partie du comité

technique créé à cet effet. Les organisations internationales, gouvernementales et non gouvernementales, en

liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec la Commission

électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.

Les Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI, Partie 3.

La tâche principale des comités techniques est d'élaborer les Normes internationales. Les projets de Normes

internationales adoptés par les comités techniques sont soumis aux comités membres pour vote. Leur publication

comme Normes internationales requiert l'approbation de 75 % au moins des comités membres votants.

Dans d'autres circonstances, en particulier lorsqu'il existe une demande urgente du marché, un comité technique

peut décider de publier d'autres types de documents normatifs:

� une Spécification publiquement disponible ISO (ISO/PAS) représente un accord entre les experts dans un

groupe de travail ISO et est acceptée pour publication si elle est approuvée par plus de 50 % des membres

votants du comité dont relève le goupe de travail;

� une Spécification technique ISO (ISO/TS) représente un accord entre les membres d'un comité technique et

est acceptée pour publication si elle est approuvée par plus de 2/3 des membres votants du comité.

Les ISO/PAS et ISO/TS font l'objet d'un nouvel examen tous les trois ans afin de décider éventuellement de leur

transformation en Normes internationales.

L'attention est appelée sur le fait que certains des éléments de la présente Spécification technique peuvent faire

l'objet de droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable de

ne pas avoir identifié de tels droits de propriété et averti de leur existence.

La Spécification technique ISO/TS 16799 a été élaborée par le comité technique ISO/TC 4, Roulements,

sous-comité SC 8, Charges de base et durée.
© ISO 1999 – Tous droits réservés iii
---------------------- Page: 3 ----------------------
ISO/TS 16799:1999(F)
Introduction

La présente Spécification technique traite des discontinuités dans le calcul des charges dynamiques de base des

roulements à billes (radiaux) et des butées à billes à contact oblique.

Les facteurs utilisés pour le calcul des charges dynamiques de base C et C , conformément à l'ISO 281, sont

r a

légèrement différents pour les roulements à billes (radiaux) et les butées à billes à contact oblique. Les méthodes

destinées à la prise en compte de l'influence des charges appliquées aux butées sur la durée de vie des

roulements sont également différentes.

C'est pourquoi, il existe une discontinuité dans la durée calculée quand un roulement avec un angle de contact

� = 45° est considéré soit comme un roulement radial, soit comme une butée. Dans les deux cas, le roulement est

sujet à la même charge axiale externe F .
iv © ISO 1999 – Tous droits réservés
---------------------- Page: 4 ----------------------
SPÉCIFICATION TECHNIQUE ISO/TS 16799:1999(F)
Roulements — Charges dynamiques de base et durée nominale —
Discontinuité dans le calcul des charges dynamiques de base
1 Domaine d'application

La présente Spécification technique explique pourquoi les facteurs de charge utilisés pour le calcul des charges

dynamiques de base C et C sont différents pour les roulements à billes (radiaux) et les butées à billes à contact

r a

oblique, et comment ces charges de base peuvent être recalculées, afin de pouvoir effectuer des comparaisons

dans les mêmes conditions.
2 Référence normative

Le document normatif suivant contient des dispositions qui, par suite de la référence qui y est faite, constituent des

dispositions valables pour la présente Spécification technique. Pour les références datées, les amendements

ultérieurs ou les révisions de ces publications ne s’appliquent pas. Toutefois, les parties prenantes aux accords

fondés sur la présente Spécification technique sont invitées à rechercher la possibilité d'appliquer l’édition la plus

récente du document normatif indiqué ci-après. Pour les références non datées, la dernière édition du document

normatif en référence s’applique. Les membres de l'ISO et de la CEI possèdent le registre des Normes

internationales en vigueur.
ISO 281:1990, Roulements — Charges dynamiq
...

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