(ISO) NTERNATIONAL STANDARD 5421 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION·MEKIYHAPOAHA OPIAHW3ALMA TIO CTAHIAPTH3ALIHH.ORGANISATION INTERNATIONALE DE NORMALISATION Ground high speed steel tool bits Barreaux rectifies en acier rapide First edition - 1977-08-01 ISO 5421-1977 (E) UDC 621.9.02 : 669.14.018.252.3 Ref. No. ISO 5421-1977 (E) Descriptors : tools, power-operated tools, tool bits, specifications, dimensions, dimensional tolerances. Price based.on 2 pages Copyright International Organization for Standardization Not for Resale 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. Standard ISO 5421 was developed by Technical International Committee ISO/TC 29, Small tools, and was circulated to the member bodies in March 1976. lt has been approved by the member bodies of the following countries : India Romania Australia Beigium Israel South Africa, Rep. of Brazil Italy Bulgaria Korea, Rep. of Sweden Czechoslovakia Mexico Switzerland France Netheriands Turkey Germany Philippines U.S.S.R. Hungary Poland Yugoslavia The member bodies of the following countries expressed disapproval of the document on technical grounds : Austria Japan United Kingdom @ International Organization for Standardization, 1977 : Printed in Switzerland CopyrightIntenationalorganizationfor Standardization ed without license from IHS Not for Resale ISO 5421-1977 (E) INTERNATIONAL STANDARD Ground high speed steel tool bits 1 SCOPE ANDFIELDOF APPLICATION 3 SQUARE SECTION TOOL BITS This International Standard lays down the dimensions of NOTE -- By agreement between user and supplier, tool bits may have slanted ends, but in such cases the overall length L shall be ground high speed steel tool bits of : equal to the length L specified in the table. round section (clause 2) - square section (clause 3) rectangular section (clause 4) - : trapezoidal section (clause 5) 2 ROUND SECTION TOOL BITS Dimensions in milimetres h L ± 2 h13 h13 63 80 100 160 200 4 4 x 5 5 x Dimensions in millimetres 9 6 x x x x d L ± 2 x x 8 8 x x x h9 9 80 00 160 200 10 10 x x X X x 4 x 12 12 x x x 5 x x x 16 16 x x x 6 × x x x + 20 20 + 8 x x x 25 25 X 10 x x x x + 12 x + 16 x x x 20 x Not for Resale