BS ISO BRITISH STANDARD 21244:2008 Agricultural equipment - Mechanical connections between towed and towing yehicles Implement hitch rings and attachment to tractor drawbars ICS 65.060.10 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BSISO21244:2008 National foreword This British Standard is the UK implementation of ISO 21244:2008. The UK participation in its preparation was entrusted to Technical Committee AGE/6, Agricultural tractorsand forestrymachinery. A list of organizations represented on this committee 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 Amendments/corrigendaissuedsincepublication published under the authority of the Standards Policy and Date Comments Strategy Committee on30June2008 BSI 2008 ISBN9780580571862 BS IS0 21244:2008 ISO INTERNATIONAL STANDARD 21244 First edition 2008-06-01 Agricultural equipment Mechanical connections between towed and towing vehicles Implement hitch rings and attachment to tractor drawbars MaterielagricoleLiaisons mecaniques entre vehicules tracteurs et vehicules tractes-Attelagesa anneaupourinstruments et fixation ala barre d'attelage Referencenumber ISO 21244:2008(E) ii BSIS0 21244:2008 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 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. 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 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. foresty,SubcommitteeSC4,Tractors. i blank BSISO21244:2008 Agricultural equipment Mechanical connections between towed and towing vehicles Implement hitch rings and attachmenttotractordrawbars 1 Scope This International Standard specifies dimensional requirements for the hitch rings of agricultural trailers and trailed implements designed to be attached to agricultural tractor drawbars of clevis type according to ISO6489-3. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)applies. IsO6489-3:2004,Agriculturalvehicles-Mechanicalconnectionsbetweentowedandtowingvehicles- Part3:Tractordrawbar Terms and definitions For the purposes of this document, the following terms and definitions apply 3.1 angleofyaw A rotation around a vertical axis of the vehicle passing through the coupling point 3.2 angle of pitch B rotation around a horizontal axis passing through the coupling point and perpendicular to the longitudinal plane of symmetry of the vehicle 3.3 angle of roll rotation around a horizontal axis passing through the coupling point and located in the plane of symmetry of the vehicle 1