ISO INTERNATIONAL STANDARD 9177-1 Third edition 2016-10-01 Mechanicalpencilsfortechnical drawings - Part 1: Classification, dimensions, performance requirements and testing Porte-minespourledessintechnique- Partie1:Classification,dimensions,exigencesdeperformanceetessais Reference number IS09177-1:2016(E) KX ISO IS02016 IS09177-1:2016(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 or by any means, electronic or mechanical, including photocopying,or posting on the internet or an intranet, without prior written permission.Permission can be requested from either IsO at theaddress below or ISO'smemberbody in the country of the requester. ISO copyright office Ch.de Blandonnet 8CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +4122 749 0111 Fax +41 22 749 09 47 copyright@iso.org www.iso.org IS0 2016- All rights reserved 1 IS09177-1:2016(E) Contents Page Foreword iv 1 Scope .1 2 Normativereferences ..1 3 Termsanddefinitions 1 4 Classification 1 5 Dimensions 5 5.1 Nominal diameter 5 5.2 Boresizeofguidepipe(mechanicalpencilsofpush-typeFandscrew-typeS) 5 5.3 Outerdiameterofguidepipe 6 6 Performancerequirements 6 6.1 General 6 6.2 Clampingforce (mechanicalpencilsofpush-typesFand L) 6 6.3 Leadposition relativetospiral clearance (mechanical pencils of screw-type S) 6 7 Testing .6 6 7.1 General 7.2 Clampingforce (mechanicalpencilsofpush-typesFand L) .6 7.3 Lead position relative to spiral clearance (mechanical pencils of screw-type S) 1 8 Designation 7 ili