ISO 5295:2023

Synchronous belts — Calculation of power rating and drive centre distance

This document establishes formulae for the calculation of power rating and centre distance of standard synchronous belts on two pulley drives. It is applicable to trapezoidal belts only. It does not apply to curvilinear synchronous belts. The numerical values of certain parameters used in the calculations depend upon the pitch and the construction of the belt and are specified by the belt manufacturer.

Courroies synchrones — Calcul de la puissance transmissible et de l'entraxe

General Information

• Status: Published
• Publication Date: 12-Jul-2023
• ICS: 21.220.10 - Belt drives and their components
• Technical Committee: ISO/TC 41/SC 4 - Synchronous belt drives
• Drafting Committee: ISO/TC 41/SC 4 - Synchronous belt drives
• Current Stage: 6060 - International Standard published
• Start Date: 13-Jul-2023
• Due Date: 09-Jun-2024
• Completion Date: 13-Jul-2023

Relations

• Revises: ISO 5295:2017 - Synchronous belts — Calculation of power rating and drive centre distance
• Effective Date: 10-Dec-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 5295
Fourth edition
2023-07
Synchronous belts — Calculation of
power rating and drive centre distance
Courroies synchrones — Calcul de la puissance transmissible et de
l'entraxe
Reference number
ISO 5295:2023(E)
© ISO 2023

---------------------- Page: 1 ----------------------
ISO 5295:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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 2023 – All rights reserved

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ISO 5295:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Basic power rating .2
6 Power rating . 2
6.1 Exact formula . 2
6.2 Approximate formula . 3
7 Centre distance . 3
7.1 Exact formula . 3
7.2 Approximate formula . 4
8 Number of teeth in mesh . 4
9 Factor k . 4
z
10 Factor k . 4
w
iii
© ISO 2023 – All rights reserved

---------------------- Page: 3 ----------------------
ISO 5295:2023(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 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
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 5295
ISO/TC 41/SC 4
Synchronous belts — Calculation of
Secretariat: ANSI
power rating and drive centre distance
Voting begins on:
2023-04-06
Courroies synchrones — Calcul de la puissance transmissible et de
l'entraxe
Voting terminates on:
2023-06-01
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 5295:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 1 ----------------------
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 5295
ISO/TC 41/SC 4
Synchronous belts — Calculation of
Secretariat: ANSI
power rating and drive centre distance
Voting begins on:
Courroies synchrones — Calcul de la puissance transmissible et de
l'entraxe
Voting terminates on:
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 5295:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 2 ----------------------
ISO/FDIS 5295:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 1
5 Basic power rating .2
6 Power rating . 2
6.1 Exact formula . 2
6.2 Approximate formula . 3
7 Centre distance . 3
7.1 Exact formula . 3
7.2 Approximate formula . 4
8 Number of teeth in mesh . 4
9 Factor k . 4
z
10 Factor k . 4
w
iii
© ISO 2023 – All rights reserved

---------------------- Page: 3 ----------------------
ISO/FDIS 5295:2023(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 non­governmental, 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 dat
...

ISO/TC 41/SC 4 N 497
Date: 2017-042023-03-22
ISO/FDIS 5295:20172023(E)
ISO/TC 41/SC 4
Secretariat: ANSI
Synchronous belts — Calculation of power rating and drive centre distance
Courroies synchrones — Calcul de la puissance transmissible et de l'entraxe
© ISO 2017 – All rights reserved

---------------------- Page: 1 ----------------------
ISO/FDIS 5295:20172023(E)
© ISO 2023
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-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: [e-mail]
Website: www.iso.org
Published in Switzerland.
ii © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 5295:20172023(E)
Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Basic power rating . 2
6 Power rating . 3
6.1 Exact formula . 3
6.2 Approximate formula . 3
7 Centre distance . 3
7.1 Exact formula . 3
Figure 1 — Centre distance . 4
7.2 Approximate formula . 4
8 Number of teeth in mesh . 4
9 Factor k . 4
z
10 Factor k . 5
w
Table 1 — Base widths of trapezoidal synchronous belts . 5
4
© ISO 2017 – All rights reserved
© ISO 2023 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/FDIS 5295:20172023(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 documentsdocument 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 drawnISO draws attention to the possibility that some of the elementsimplementation of this
document may beinvolve the subjectuse 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. 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 ).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation onof 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:
...