ISO INTERNATIONAL STANDARD 25178-1 First edition 2016-04-15 Geometrical product specifications (GPS) Surface texture: Areal - Part 1: Indication of surface texture Spécification géométrique des produits (GPS) - Etat de surface: Surfacique- Partie 1: Indication des états de surface Accessed by UNSW - LIBRARY on 15 Jun 2016 (Document currency not guaranteed when printed) Reference number IS0 25178-1:2016(E) OSI @IS02016 IS0 25178-1:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form writtenpermission.Permission canberequestedfromeitherIsOattheaddressbelow orIso'smemberbodyinthecountryof the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org i @ IS0 2016 - All rights reserved IS0 25178-1:2016(E) Contents Page Foreword ..iv Introduction ..vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Graphical symbols for the indication of areal surface texture ..1 5 Composition of complete graphical symbol for areal surface texture .3 5.1 General. .3 5.2 Positions of surface texture requirements .3 6 Indication of areal surface parameters 4 6.1 Definition of the tolerance 4 6.2 Definition of the parameter. .5 6.3 Indication of manufacturing method or related information 5 6.4 Indication of surface lay. .5 6.5 Indication of machining allowance. 7 6.6 Position on drawings and other technical product documentation. 7 6.7 Proportions and dimensions of graphical symbols 7 6.8 Orientation of the evaluation area .7 1 Coordinate system ..7 8 Digital product definition data .8 Annex A (normative) Proportions and dimensions of graphical symbols ...9 Annex B (normative) Indications for unambiguous surface texture specifications ..11 Annex C (informative) Examples of indications of areal surface texture requirements . ..15 Annex D (informative) Recommended procedures for indication of intersection planes ..19 Annex E (informative) Iso special specification elements for areal surface texture ..22 Annex F (informative) Relation to the GPS matrix model ..24 Bibliography ..25 @ IS0 2016 - All rights reserved ii