ISO INTERNATIONAL STANDARD 4392-3 First edition 1993-12-15 Hydraulic fluid power Determination of characteristics of motors -- Part 3: At constant flow and at constant torque Transmissions hydrauliques - Determination des caractéristiques des moteurs Partie 3: Essai a débit constant et couple constant ISO Reference number ISO4392-3:1993(E) Not for Resale ISO 4392-3:1993(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (lEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Internationai Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 4392-3 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Sub-Committee SC 8, Product testing and contamination control. IsO 4392 consists of the following parts, under the general title Hydraulic fluid power -Determination of characteristics of motors: - Part 1: At constant low speed and at constant pressure Part 2: Startability - Part 3: At constant flow and at constant torque Annexes A and B form an integral part of this part of ISO 4392. ISO 1993 All rights reserved. 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 per- mission in writing from the publisher. International Organization for Standardization Case Postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii ernational Organization for Standardization Not for Resale ISO4392-3:1993(E) Introduction In hydraulic fluid power systems, power is transmitted and controlled through a fluid under pressure within an enclosed circuit. Hydraulic motors are units which transform hydraulic energy into mech- anical energy, usually with a rotary output. ii Copyightlntematinal Organizatin for standardizatin No reproduction or networking permitted withoutlicense from IHS Not for Resale