ISO INTERNATIONAL STANDARD 299 Second edition 1987-04-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEKAYHAPOAHAAOPIAHM3ALMROCTAHAAPTW3ALMM Machine tool tables - T-slots and corresponding bolts Tables de machines-outils - Rainures a T et boulons correspondants Referencenumber ISO 299: 1987 (E) Copyright Intermational Organization for Standardization nitted without license from IHS Not for Resale Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member mental and non-governmental, in liaison with ISo, also take part in the work. Draft International Standardsadopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 299 was prepared by Technical Committee ISO/TC 39, Machine tools. This second edition cancels and replaces the first edition (ISo 299 : 1973), of which the dimensions in inches have been deleted and to which clause 5 has been added. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. International Organization for Standardization, 1987 Printed in Switzerland Copyright Intenational Organizationfor Standardization No reproduct mitted without license from IHS Not for Resale INTERNATIONALSTANDARD ISO 299 : 1987 (E) Machine tool tables - T-slots and corresponding boits Scope and field of application except for the dimensions of bolts below 6 mm and above 36 mm for which there are no corresponding values, will form This International Standard specifies, in millimetres, the dimen- the subject of an addendum. The corresponding values will en- sions and spacing of T-slots for machine tool tables. sure practicat interchangeability between machines made in either of the two measurement systems, as well as inter- it also specifies the metric dimensions of bolts to be used in changeability with existing machines in many cases. these slots. For reference or fixing slots, there is no interchangeability from one measurement system to the other, since the nominal 2 Dimensions of slots and bolts dimension, A, will not be identical in this International Stan- dard and its addendum. The dimensions of T-slots and of the corresponding bolts are specified in table 1. The corresponding dimensions in inches, Copyright Intenational Organization for Standardization 1 No reproduct g permitted without license from IHS Not for Resale