BS ISO BRITISH STANDARD 3442-3:2007 Machine tools Dimensions and geometric tests for self-centring chucks with two-piece jaws - Part 3: Power-operated chucks with serrated jaws ICS 25.060.20 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BSIS03442-3:2007 National foreword This British Standard was published by BSI. It is the UK implementation of ISO3442-3:2007.Together with BSISO3442-1andBSISO3442-2it supersedes BS 1983-7:1994 and BS 1983-6:1994which are withdrawn. The UK participation in its preparation was entrusted to Technical Committee MTE/1, Machine tools. A list of organizations represented on MTE/1 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was Amendmentsissuedsincepublication published under the authority of the Standards Policy and Amd. No. Date Comments Strategy Committee on 30 March 2007 BSI 2007 ISBN 9780580501968 BS ISO 3442-3:2007 ISO INTERNATIONAL STANDARD 3442-3 First edition 2007-02-01 Machine tools Dimensions and geometric tests for self-centring chucks with two-piece jaws - Part 3: Power-operated chucks with serrated jaws Machines-outilsDimensions etessais geometriquespourmandrinsa serrage concentrique et a mors rapportes- Partie3:Mandrinsacommandeaxialeassisteeavecmorsa assemblagepardentelure Reference number ISO 3442-3:2007(E) ii BSISO3442-3:2007 Contents Page Foreword iv 1 Scope. 2 Normativereferences 3 Preliminary remarks 3.1 Measuring units .... 3.2 Geometric tests.... 3.3 Tests to be performed. 4 Precisionclasses 5 Sizes for interchangeability..... 5.1 9o°serrations-Dimensions.. 5.2 9o°serrationsPermissiblecumulativepitch deviation.. 5.3 6o serrationsDimensions..... 5.4 6o°serrationsPermissiblecumulativepitchdeviation... 5.5 JawnutsDimensions. 6 Geometric tests. 6.1 Test mandrels. 6.2 Spindle or face plateaccuracy. 6.3 Chuckbodyaccuracy.. 6.4 Test with test top jaws (hard jaws) 6.5 Tests with machined top jaws.... 6.6 Tests off-the-spindle...... 6.7 Chuck accuracy ili BSISO 3442-3:2007 Foreword IsoO (the International Organization for Standardization) is a worldwide federation of national standards bodies non-governmental, in liaison with isO, also take part in the work. iso collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 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. ISO3442-3waspreparedbyTechnicalCommitteeISO/TC39,Machinetools,SubcommitteeSC8,Work holding spindles and chucks. This first edition of IsO 3442-3,together with IsO 3442-1 and ISO3442-2 cancels and replaces ISO3442:1991and ISO9401:1991.ISO/TC 39/SC 8 decided to divideISO3442:1991 into three parts and to combine them with ISO 9401:1991. When all three parts of ISO 3442 are published, ISO 3442:1991 and ISO 9401:1991 will be withdrawn. Iso 3442 consists of the following parts, under the general title Machine tools Dimensions and geometric tests for self-centring chucks with two-piece jaws: Part1:Manuallyoperatedchuckswithtongueandgroovetypejaws Part2:Power-operatedchuckswithtongueandgroovetypejaws -Part3:Power-operatedchuckswithserrated jaws iv BSISO3442-3:2007 Machine tools Dimensions and geometric tests for self- centring chucks withtwo-piecejaws- Part 3: Power-operated chucks with serrated jaws 1 Scope This partof Is0 3442 specifies90°and 60°serrations and jaw nuts applicable to90°and 60°serrations for mountingthetopjawsonthe