ISO INTERNATIONAL STANDARD 701 Second edition 1998-05-15 International gear notation Symbols for geometrical data Notation internationale des engrenages Symboles géometriques [so Reference number ISO 701:1998(E) by IHS under lic Not for Resale ISO 701:1998(E) Foreword IsO (the International Organization for Standardization) is a wordwide 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 onthatcommittee. 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. 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. International Standard isO 701 was prepared by Technical Committee ISO/TC 6o, Gears, Subcommittee SC 1, Nomenclature and worm gears. This second edition of IsO 701 cancels and replaces the first edition (iSO 701:1976), which has been technically revised. @ISO1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced microfilm, without permission in writing from the publisher. International OrganizationforStandardization Case postale 56· CH-1211 Geneve 20 · Switzerland Internet [email protected] Printed in Switzerland Not for Resale @ ISO ISO 701:1998(E) Introduction The symbols in this International Standard are defined for use in relation to the principal geometrical terms defined in IsO 1122-1:1998, Vocabulary of gear terms Part 1: Definitions related to geometry. Consequently, it is important: that these symbols be used in national standards and，where appropriate, in other national documents in order to facilitate the understandingofdocumentswhichareexchangedbetweencountries; to use for geometrical data only those combinations of letters which are given in the tables of this International Standard, in order to avoid any risk of confusion with symbols relating to other gear data, which maybedeterminedlater. ili permitted without license from IHS Not for Resale