150 3002 PT*1 82 4851903 0516503 554 ISO INTERNATIONAL 3002-1 STANDARD Second edition 1982-08-01 AMENDMENT 1 1992-12-01 Basic quantities in cutting and grinding - Part 1 : Geometry of the active part of cutting tools General terms, reference systems, tool and working angles, chip breakers AMENDMENT 1 Grandeurs de base pour la coupe et la rectification - Partie 1 : Géométrie de la partie active des outils coupants -- Notions genérales, systeme de reference, angles de I'outil et angles en travail, brise-copeaux AMENDEMENT1 Reference number ISO 3002-1 : 1982/Amd.1 : 1992 (E) Copyright International Organization for Standardization Not for Resale 06h h059T50 E06T5t 2# T*Jd 200E 051 ISO 3002-1 : 1982/Amd.1 : 1992 (E) 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 body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISo, also take part in the work. IsO collaborates closely with the lnternational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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. Amendment 1 to International Standard Is0 3002-1 : 1982 was prepared by Technical Committee ISO/TC 29, Small tools. @ISO 1992 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanicai, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland Copyright International Organization for Standardization Not for Resale 22E 5059150 E06T59 20 *1d 200 051 ISO 3002-1 : 1982/Amd.1 : 1992 (E) Basic quantities in cutting and grinding 一 Part 1 : Geometry of the active part of cutting tools - General terms, reference systems, tool and working angles, chip breakers AMENDMENT 1 Page 46 Add the following clause 8 and figures 36 to 41 to IS0 3002-1. 8 Direction of the helix and cutting direction (see figures 36 to 41) To define a rotating tool, it may be necessary to specify its cutting direction and, except for straight-toothed tools, the direction of its helix. The direction of the helix and the cutting direction are independent of each other. Figures 36 to 41 provide examples of the direction of the helix and the cutting direction. The arrow perpendicular to the flutes indicates the cutting direction. 8.1 Direction of the helix (figures 36, 37, 38 and 41) The concept of "direction of the helix" applies only to rotating tools with flutes, whatever their design: solid tools, brazed cutting edge tools or toois with indexable inserts. A tool with flutes can be "straight-toothed" or "helical-toothed". A helical-toothed tool is termed that of right-hand thread); a "left-hand helix" if the helix winds in a counterclockwise direction in the same conditions. NOTES 1Staggered-tooth tools exist. 2 Clause 5 of this International Standard gives a clear definition of the angles of the active part of cutting tools and of their signs (see 5.3). When the flutes define the major or minor cutting edge position, the direction of the helix is in direct relation with the sign of the major cutting edge inclination (as) or the minor cutting edge inclination (ag ), subject to the fllowing conventions (see 5.3.1.3). the selected point on the cutting edge is taken at the tool corner which is farthest from the tool drive part; the observation direction is oriented from the selected co