BS ISO BRITISHSTANDARD 1977:2006 Conveyor chains, attachments and sprockets ICS 53.040.20 BSi British Standards BS ISO 1977:2006 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 1977:2006.It supersedes BS ISO 1977:2000 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MCE/1, Chains and chain sprockets for power transmission and conveyors. A list of organizations represented on MCE/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. Compliancewith a British Standard cannot confer immunityfrom legal obligations. This British Standard was Amendmentsissuedsincepublication published undertheauthority of the Standards Policy and Amd. No. Date Comments Strategy Committee on 29 September 2006 BSI 2006 ISBN 0580 48990 6 BSISO 1977:2006 ISO INTERNATIONAL 1977 STANDARD Second edition 2006-08-15 Conveyor chains, attachments and sprockets Chaines de manutention,plaques-attaches et roues dentees Reference number ISO 1977:2006(E) TSO ii BS ISO 1977:2006 Contents Page Foreword iv Introduction 1 Scope 2 Normativereferences.... 3 Chains. 3.1 Nomenclature. 3.2 Dimensions.... 3.3 Tensile testing 3.4 Length accuracy 3.5 Cranked links 3.6 Designation 3.7 Marking 4 Attachments 4.1 K attachments 4.2 Deepplates. 5 Sprockets.. 5.1 Diametral dimensions..... 5.2 Sprockettoothgapform 10 5.3 Rim profile... 5.4 Radial run-out. 5.5 Axial run-out..... 2 5.6 Boretolerances 5.7 Marking .. Annex A (normative) Pitch-circle diameters. ili BSIS01977:2006 Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 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. rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 1977 was prepared by Technical Committee ISO/TC 100, Chains and chain sprockets for power transmissionandconveyors. This second edition cancels and replaces the first edition (isO 1977:2000), Figures 2 and 5, as well as 5.4 and 5.5, of which have been technically revised. iv BS IS0 1977:2006 Introduction combines into a single document IsO 1977-1,ISO 1977-2 and ISO 1977-3, which covered ISO1977 metric-series chains and attachments, and chain wheels, while at the same time revising their technical content. plates in the MC series of chains, an increase in the width between inner plates in M-series, MC56, MC112 and MC224 chains, and the addition of the small roller diameter to the MC series. New information on the calculation of sprocket tip diameters and tooth heights above root diameters is also given. V