5679 (ISO International Standard INTERNATIONALORGANIZATION FOR STANDARDIZATIONMEKAYHAPOAHAA OPIAHW3ALMA IO CTAHAAPTW3ALMMORGANISATION INTERNATIONALE DE NORMALISATION ANsl Internot or sect Equipment for working the soil -- Disks - Classification, main fixing dimensions and specifications Materiel de travail du sol - Disques -- Classification, principales dimensions de fixation, et specifications First edition - 1979-04-15 MAY 0 3 1979 UDC 631.316.022 Ref. No. 1SO 5679-1979 (E) ISO 5679-1979 (E) Price based on 7 pages Copyright International Organization for Standardization FOREWORD IsO (the International Organization for Standardization) is a worldwide federation of nationat standards institutes (ISO member bodies). The work of developing International Standards is carried out through ISO technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International'organizations, governmental and non-governmental, in liaison with iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IsO Council. international Standard ISO 5679 was developed by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, and was circulated to the member bodies in March 1977. it has been approved by the member bodies of the following countries : France Australia Romania Austria Germany, F.R. South Africa, Rep. of Belgium Iran Spain Brazil Italy Sweden Bulgaria Korea, Dem. P. Rep. of Switzerland Chile Korea, Rep. of Turkey Czechoslovakia Philippines United Kingdom Denmark Poland USSR Finland Portugal The member bodies of the following countries expressed disapproval of the document on technical grounds : India Mexico New Zealand @ Internationat Organization for Standardization, 1979' Printed in Switzeriand Copyright International Organization for Standardization d without license from IHS ISO 5679-1979 (E) INTERNATIONAL STANDARD Equipment for working the soil -- Disks -- Classification, main fixing dimensions and specifications 0 INTRODUCTION 4 CLASSIFICATION The main purpose of this International Standard is to Disks shall be classified as follows : ensure interchangeability for a minimum number of types Type A -- Flat disks (see ISO/TR 4122) and sizes of disks to meet the requirements of a wide range of conditions of work. Type B - Concave disks which may have the following The standard specifies three types of disks. This division variants : into distinct designs of disks was found to be preferable Variant 1 - disks with square centre hole (see figure 1) to classification according to use with a particular implement, because of lack of clear demarcation in usage of Variant 2 --- disks with round centre hole (see figure 2) the various designs. Variant 3 - disks with · several fixing holes It will be appreciated that some apparent irregularities in (see figure 3) with or without centre hole sequence of nominal size or dimensions in the tables arises Type C - Concave disks with a flat area around the from different fields of usage of a particular type of disk. centre hole square (see figure 4). The dimensional tolerances given are not unnecessarily NOTE - All variants of disks may have cutouts. tight and are consistent with the requirements of inter- changeability. 5 SPECIFICATION 5.1 Nominal dimensions 1 SCOPE The nominal dimensions of the disks shall be as given in This International Standard specifies interchangeability table 1 for concave disks with centre hole, and in table 2 dimensions for agricultural disks of the same type and for concave disk with several fixing holes. nominal size, classified as types A, B and C. 5.2 Cutting edge bevelling Flat disks shall have the cutting edge bevelled on both sides. The concave disks shall be bevelled on either the concave 2 FIELD