ISO INTERNATIONAL STANDARD 9457-1 First edition 1991-04-15 Road vehicles --- Metric starter motor pinions Part 1: Currently used pinions Vehicules routiers -- Pignons de demarreurs a module metrique - Partie 1: Pignons d'usage courant Reference number ISO 9457-1:1991(E) Not for Resale d without license from IHS ISO 9457-1:1991(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, govern- mental 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 Inter- national Standard requires approval by at least 75 % of the member bodies casting a vote. ISO/TC 22, Road vehicles. Iso 9457 conslsts of the following parts, under the general title Road vehicles -- Metric starter motor pinions: Part 1: Currently used pinions E --- A future part will cover pinions with a 2o° pressure angle. NOTE @ IsO 1991 or by any means, electronic or mechanical, Including photocopying and microflm, without permisslon in writing from the publisher. tnternatlonal Organlzation for Standardization Case Postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland t license from IHS Not for Resale INTERNATIONAL STANDARD ISO 9457-1:1991(E) Road vehicles --- Metric starter motor pinions Part 1: Currently used pinions 1 Scope 2 Dlmenslons Detailed tooth limit dimensions and the base tangent length as the inspection value, W2, are given in table 1 for currently used starter motor pinions This part of iso 9457 specifies the metric modules, pressure angles, number of teeth and other tooth NOTE 1 The symbols, which are in accordance with Iso 701:1976, International gear notation --- Symbols for characteristics which are necessary to ensure geometrical data, are illustrated in figure 1. interchangeability of currentiy used starter motor pinions (those with a pressure angle of 14° 30') used for starter motors mounted on reciprocating interna! Other dimensions and specifications 3 combustion engines for road vehicles. Dimensions and requirements not given in this part of Iso 9457 are left to the manufacturer's choice. Copyright International Organization for Standardization Not for Resale