BS ISO 2540:2016 INTERNATIONAL ISO STANDARD 2540 Second edition 2016-11-01 Centre drills for centre holes with protecting chamfer Type B Forets a centrer pour centres avec chanfrein de protection - Type B Reference number A ISO 2540:2016(E) ISO @IS02016 BS IS0 2540:2016 IS0 2540:2016(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 written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of 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 ii @ IS0 2016 - All rights reserved BS IS0 2540:2016 IS0 2540:2016(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Designation 3 Dimensions Annex A (normative) Dimensions for centre hole - Type B and choice of dimensioning method 3 Annex B (informative) Relationship between designations in this International Standard and IS0 13399 (all parts) 5 Bibliography 6 @ IS0 2016 - All rights reserved iii