ISO INTERNATIONAL STANDARD 8486-1 First edition 1996-08-15 Bonded abrasives Determination and designation of grain size distribution - Part 1: Macrogrits F4 to F220 Abrasifs agglomeres -Determination et désignation de la distribution granulometrique Partie 1:Macrograins F4a F220 ISO Reference number ISO 8486-1:1996(E) Copyright Intermational Organization for Standardization mitted without license from IHS Not for Resale ISO 8486-1:1996(E) Foreword isO (the International Organization for Standardization) is a worldwide fed- preparing international Standards is normally carried out through isO resented on that committee. International organizations, governmental and non-governmental, in liaison with isO, also take part in the work. isO col- laborates closely with the International Electrotechnical Commission (lEC) onallmattersofelectrotechnicalstandardization. Draft International Standards adopted by the technical committees are cir- culated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. ISO/TC 29, Small tools, Subcommittee SC 5, Grinding wheels and abras- ives. This first edition of ISO 8486-1 cancels and replaces 1SO 8486:1986, which has been technically revised. ISO 8486 consists of the following parts, under the general title Bonded abrasives Determination and designation of grain size distribution: Part 1:Macrogrits F4toF220 Part 2:Microgrits F230 to F1200 Annex A of this part of ISO 8486 is for information only. @ISO1996 All rights reserved. Unless otherwise specified, no part of this publication may be repro duced or utilized in any form or by any means, electronic or mechanical, including photo- copying and microfilm, without permission in writing from the publisher. InternationalOrganizationforStandardization Case Postale 56. CH-1211 Geneve 20. Switzerland Printed in Switzerland Copyright International Organization for Standardization without license from IHS Not for Resale @ISO INTERNATIONALSTANDARD ISO 8486-1:1996(E) Bonded abrasives Determination and designation of grain size distribution Part 1: Macrogrits F4 to F220 1 Scope 3 Definitions This part of ISO 8486 sets forth a method for deter- For the purposes of this part of 1sO 8486 the follow mining or checking the size distribution of macrogrits ing definitions apply. from F4 to F220 in fused aluminium oxide and silicon carbide. 3.1 abrasive grain: Synthetic particulate substance manufactured by crushing and classified into specific It specifies the grit designation for the testing of those grit sizes used for the removal of surplus material by grits used in the manufacture of bonded abrasive grinding, polishing, lapping, etc. products and general industrial applications and those removed from bonded products. 3.2 grain size distribution: The percentage of indi- vidually sized particles contained in the designated grit sizes. 2 Normative references The following standards contain provisions which 4 Grain size distribution testing through reference in this text, constitute provisions of this part of iSO 8486. At the time of publication, the editions indicated were valid. All standards are subject 4.1 Equipment to revision, and parties to agreements based on this part of ISO 8486 are encouraged to investigate the possibility of applying the most recent editions of the 4.1.1 Sieving machine, accordance with standards indicated below. Members of IEC and iSO ISO9284. maintain registers of currently valid International Stan- dards 4.1.2 Sieves having the aperture sizes indicated in table 1, in accordance with Iso 3310-1. ISO 3310-1:1990, Test sieves - -Technical require- mentsandtesting-Part1:Testsievesofmetalwire Test sieves are designated by their aperture size in cloth. micrometres if the aperture is less that 1 mm and in millimetres if it is equal to or greater than 1 mm. IsO 9138:1993,Abrasive grains —Sampling and split ting. 4.1.3 Balance accurate to ± 0,1 g. IsO 92