ISO INTERNATIONAL STANDARD 9270-2 First edition 2010-08-15 7/24 taper spindle noses for automatic tool changers Part 2: Dimensions and designation of spindle noses of forms J and JF Nez de broches a conicite 7/24 pour changement automatique d'outils- Partie 2: Dimensions et designation des nez de broches de formes J et JF Reference number ISO 9270-2:2010(E) @ ISO 2010 ISO 9270-2:2010(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeer 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. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards 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. Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 9270-2 was prepared by Technical Committee ISO/TC 29, Small tools. This first edition, together with ISO 9270-1, cancels and replaces (IsO 9270:1992), which has been technically revised to take into account the new tool shanks with 7/24 taper for automatic tool changers defined in ISO7388-2. Iso 9270 consists of the following parts, under the general title 7/24 taper spindle noses for automatic tool changers: Part 1: Dimensions and designation of spindle noses of forms S and SF Part 2: Dimensions and designation of spindle noses of forms J and JF @ ISO 2010 - All rights reserved ii INTERNATIONAL STANDARD ISO 9270-2:2010(E) 7/24 taper spindle noses for automatic tool changers - Part 2: Dimensions and designation of spindle noses of forms J and JF 1 Scope This part of IsO 9270 specifies the dimensions and tolerances of 7/24 taper spindle noses with tenons for automatic tool changers, intended for use with the corresponding tool shanks of forms J, JD and JF according tolSO7388-2. 2Normative references The following referenced documents are indispensable for the application of this document. For dated document (including any amendments) applies. IsO 273, Fasteners — Clearance holes for bolts and screws Iso 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Part1:Bolts,screws and studs with specified property classes Coarse thread and fine pitch thread IsO 965-2, /sO general purpose metric screw threads- Tolerances- Part 2: Limits of sizes for general purpose external and internal screw threads -Medium quality IsO 2768-1:1989, General tolerances - Part 1: Tolerances for linear and angular dimensions without individual tolerance indications Iso 2768-2:1989, General tolerances - Part 2: Geometrical tolerances for features without individual tolerance indications IsO 4762, Hexagon socket head cap screws IsO 8015, Geometrical product specifications (GPs) Fundamentals Concepts, principles and rules IsO2010-All rightsreserved