ISO INTERNATIONAL STANDARD 11837 First edition 2011-07-15 Machinery for forestry Saw chain shot guarding systems Test method and performance criteria Materiel forestier- Systeme de protection contre I'ejection d'elements de chaines de scie - Méthode d'essai et criteres de performance Reference number ISO 11837:2011(E) ISO ISO2011 by IHS under lic No reproduction or networking permitted without license from IHS Not for Resale ISO 11837:2011(E) COPYRiGHTPROTECTEDDOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 · CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2011 - All rights reserved or networking permited withoutlicense from IHS Not for Resale ISO 11837:2011(E) Contents Page Foreword .. iv Introduction 1 Scope 2 Terms and definitions. 3 Test equipment. 3.1 Test apparatus 3.2 Drive unit ... 2 3.3 Saw chain speed control. 3.4 Drive shaft speed measurement 3.5 Saw chain tensioning system 3.6 Sawchainlubricationsystem 3.7 Saw chain stopping device 3.8 Protective cover.. 4 Cutting attachment. 2 4.1 Guide bar.. 4.2 Drive sprocket 4.3 Saw chain 5 Reference panels 3 6 Pre-calibration of test arrangement 7 Assembly of saw chain shot guarding system in test rig 7.1 Position... 7.2 Alternative positions 7.3 Obstacles... 8 Test procedure. 9 Total number of test runs. 6 10 Performance requirements. 6 11 Test report .. 6 Annex A (normative) Saw chain stopping device ili ed without license from IHS Not for Resale