ISO/TR TECHNICAL REPORT 20571 First edition 2018-10 Dynaload Design and construction Use and maintenance Dynaload Conception et construction Utilisation et maintenance Reference number IS0/TR 20571:2018(E) Tso @IS02018 IS0/TR 20571:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 the address below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS0/TR 20571:2018(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 4 General. ..1 5 Relationship with standards .3 6 Design ..4 6.1 Preferred sizes. ..4 6.2 Test tool .4 6.2.1 Type 1: 1 piece - Solid formed tool piece and tool foot .4 6.2.2 Type 2: Two pieces - Tapered end tool piece with a mating tool foot ..5 7 Cooling. .6 7.1 Low pressure air cooling .6 7.2 Alternative cooling. ..7 8 Operational features .7 9 Maintenance ..8 10 Construction ..8 Annex A (informative) Type 1 Single piece square-end Dynaload ..10 Annex B (informative) Type 2 Single piece taper-fit Dynaload ..12 Annex C (informative) Design and constructional details ..14 Annex D (informative) Recoil spring .29 Bibliography .31 IS0 2018 - All rights reserved ii