ANSI/AGMA 6123-C16 American GearManufacturers (Revision of ANSI/AGMA 6123-B06) Association NOTE: Please see last page for errata American National Standard Design Manual for Enclosed Epicyclic Gear Drives ANSI/AGMA 6123-C16 Nchan27 ation 5908977 No reproduction or networking permitted without license from IHS ANSI/AGMA 6123-C16 AMERICANNATIONALSTANDARD American Design Manual for Enclosed Epicyclic Gear Drives National ANSI/AGMA 6123-C16 Standard [Revision of ANSI/AGMA 6123-B06] Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether they have approved the standards or not, from manufacturing, marketing, purchasing or using products, processes or procedures not conforming to the standards. The AmericanNational Standards Institute does notdevelop standards and will inno circumstances give an interpretation of any American National Standard. Moreover, Requests for interpretation of this standard should be addressed to the American Gear Manufacturers Association. CAUTION NOTICE: AGMA technical publications are subject to constant improvement, revision or withdrawal as dictated by experience. Any person who refers to any AGMA Technical Publication should be sure that the publication is the latest available from the Association on the subject matter. [Tables or other self-supporting sections may be referenced. Citations should read: See ANSI/AGMA 6123-16, Design Manual for Enclosed Epicyclic Gear Drives, published by the American Gear Manufacturers Association, 1001 N. Fairfax Street, Suite 500, Alexandria, Virginia 22314, http://www.agma.org.] Approved August 26, 2016 ABSTRACT This is a design manual for drives employing epicyclic gear arrangements. It includes descriptions of epicyclic drives, nomenclature, application information and design guidelines with reference to other AGMA standards. Published by American Gear Manufacturers Association 1001 N. Fairfax Street, Suite 500, Alexandria, Virginia 22314 Copyright 2016 by American Gear Manufacturers Association All rights reserved. retrieval system or otherwise, without prior written permission of the publisher. Printed in the United States of America ISBN:978-1-55589-059-9 Prmeian Gear ManuraTurAA 2016 - All rights reserved indardization 5908977 i No reproduction or networking permited without license from IHS ANSI/AGMA 6123-C16 AMERICANNATIONALSTANDARD Contents Foreword... .vii Scope... 1.1 Limitations 2 Normative references 3 Symbols and terminology 3.1 Symbols... 3.2 Nomenclature.. 4 Applications .. 8 4.1 Custom designed drives... .8 4.1.1 Drive selectionby loadspectrum .8 4.1.2 Determination of the equivalent torque, Teq .8 4.1.3 Maximum loads.. 4.1.4 Component sizing . 4.2 Catalog drives .... 4.2.1 Unit rating definition ... 4.2.2 Selection of service factors. 4.3 System dynamics ... 4.3.1 Vibration analysis, dynamic loads. 11 4.3.2 Natural frequencies..... 4.3.3 System induced failure 4.3.4 Specialsystemconsiderations 4.3.5 Load sharing ..... 12 4.3.6 Torque variation.. 12 4.4 Epicyclic system noise 12 4.4.1 Engagement impulse. 12 4.4.2 Pitch circle impulse . 12 4.5 Special considerations 12 4.6 Speed considerations.. 13 4.6.1 Pitchline velocity 13 4.6.2 Rotational speed. 14 4.6.3 Thermaleffects 14 Epicyclic gearing arrangements . .14 5.1 Fixed element.. 15 5.2 Types. 15 5.2.1 Simple epicyclic 15 5.2.2 Compound epicyclic. 15 5.2.3 Coupled epicyclic. 15 5.2.4 Differential epicyclic . 15 5.3 Epicyclic speed rat