ANSI/AGMA 6123-B06 AMERICAN NATIONAL STANDARD Design Manual for Enclosed Epicyclic Gear Drives ANSI/AGMA 6123-B06 AGMA STANDARD Copyright American Gear Manufacturers Association No reproc nitted without license from IHS Not for Re e,12/05/2007 Design Manual for Enclosed Epicyclic Gear Drives American AGMA6123-B06 National [Revision of ANSI/AGMA 6023-A88 and ANSI/AGMA 6123-A88] Standard Approval of an American National Standard requires verification by ANSI that the require ments for due process, consensus, and other criteria for approval have been met by the standardsdeveloper. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreementhas been reached by directlyand materiallyaffectedinterests. Substantial agreement means much more than a simple majority, but not necessarily una- nimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. TheuseofAmericanNationalStandardsiscompletelyvoluntary;theirexistencedoesnot inanyrespectprecludeanyone,whetherhehasapprovedthestandardsornot,from manufacturing, marketing, purchasing, or using products, processes, or procedures not conformingtothestandards. The American National Standards Institute does not develop standards and will in no person shall have the right or authority to issue an interpretation of an American National tation of this standard should be addressed to the American Gear Manufacturers Association. CAUTION NOTICE: AGMA technical publications are subject to constant improvement. 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 ANSl/AGMA 6123-B06, Design ManualforEnclosed Epicyclic Gear Drives, published by the American Gear Manufacturers Association, 500 Montgomery Street, Suite 350, Alexandria, Virginia 22314, http://www.agma.org.] Approved September 20, 2006 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 500 Montgomery Street, Suite 350, Alexandria, Virginia 22314 Copyright @ 2006 by American Gear Manufacturers Association All rights reserved. Printed in the United States of America ISBN: 1-55589-875-0 Copyright American Gear Manufacturers Association e from IHS AMERICAN NATIONAL STANDARD ANSI/AGMA6123-B06 Contents Foreword Scope 2 Normative references 3 Symbols and terminology 2 4 8 5 Epicyclic gearing arrangements 15 6 Meshing and assembly requirements 24 7 Tooth geometry 34 8 Circulating power 35 9 Load sharing 37 10 Components 38 11 Thermal power rating 50 12 Lubrication 63 Bibliography 96 Annexes A Example of preliminary design procedure for a simple epicyclic gear set . . . 66 B Special considerations in design of epicyclic gearboxes 70 c Calculated example of two stage wind turbine speed increaser 73 D Calculated example of catalog epicyclic speed reducer E Example of compound planetary drive 84 F Compound planetary timing 86 G Example of thermal rating calculations 90 Tables 1 Symbolsandterms 2 2 Exponent p and number of load cycles NL ref for steel gears . 9 3 Speed ratios 17 4 Guideline for maximum ratio for simple star and planetary epicyclics with different numbers of planets . . 26 5 Epicyclic gear train meshing requirements . 27 6 Epicyclic gear factorizing and non-factorizing 28 7 Hunting tooth relations .. . 29 8 Meshloadfactorfortheheaviestloadedplanet 37 9 Fastener preload tensile stress 45 10 Joint stiffness factor 45 11 Load peak frequency factor, fL 47 12 Bearing dip factor (oil bath lubrication), fo 55 13 Factors for calculating M1 57 14 Exponents for calculation of M1 58 15 Factor f2 for cylindrical roller bearings 58 16 Maximum al