AGMA-6114-A06-2006.pdf
ANSI/AGMA6114-A06 ANSI/AGMA 6114-A06 Metric Edition of ANSI/AGMA 6014-A06 AMERICAN NATIONAL STANDARD Gear Power Rating for Cylindrical Shell and Trunnion Supported Equipment (Metric Edition) Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 03:09:35 MDTNo reproduction or networking permitted without license from IHS -,-,- ii GearPowerRatingforCylindricalShellandTrunnionSupportedEquipment (Metric Edition) ANSI/AGMA 6114-A06 (Metric Edition of ANSI/AGMA 6014-A06) ApprovalofanAmericanNationalStandardrequiresverificationbyANSIthattherequire- ments for due process, consensus, and other criteria for approval have been met by the standards developer. Consensusis establishedwhen,inthejudgmentoftheANSIBoardofStandardsReview, substantial agreement has been reached by directly and materially affected interests. Substantialagreementmeansmuchmorethanasimplemajority,butnotnecessarilyuna- nimity.Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. TheuseofAmericanNationalStandardsiscompletelyvoluntary;theirexistencedoesnot in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National StandardinthenameoftheAmericanNationalStandardsInstitute. Requestsforinterpre- tation 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 technicalpublicationshouldbesurethatthepublicationisthelatestavailablefromtheAs- sociation on the subject matter. Tables or other self-supporting sections may be referenced. Citations shouldread: See ANSI/AGMA6114-A06,GearPowerRatingforCylindricalShellandTrunnionSupported Equipment (Metric Edition), published by the American Gear Manufacturers Association, 500 Montgomery Street, Suite 350, Alexandria, Virginia 22314, http:/www.agma.org. Approved September 29, 2006 ABSTRACT This standard specifies a method for rating the pitting resistance and bending strength of open or semi- enclosed spur, single helical, double helical, and herringbone gears made from steel and spheroidal graphitic ironforuseoncylindricalshellandtrunnionsupportedequipmentsuchascylindricalgrindingmills,kilns,cool- ersanddryers. Annexescoverinstallation,alignment,maintenance,lubrication,andaratingmethodforgears made from ausferritic ductile iron. Published by American Gear Manufacturers Association 500 Montgomery Street, Suite 350, Alexandria, Virginia 22314 Copyright © 2006 by American Gear Manufacturers Association All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher. Printed in the United States of America ISBN: 1-55589-877-7 American National Standard Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 03:09:35 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/AGMA 6114- -A06AMERICAN NATIONAL STANDARD iii© AGMA 2006 - All rights reserved Contents Page Forewordv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Scope1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Normative references2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Definitions and symbols3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Application5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Criteria for tooth capacity7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Rating formulas9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Geometry factors, ZIand YJ10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Dynamic factor, Kvm10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Elastic coefficient, ZE12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Service factor12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Hardness ratio factor, ZW13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Load distribution factor, KH14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Allowable stress numbers, HPand FP16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Momentary overloads30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Stress cycle factors, ZNand YN31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bibliography71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Annexes ANew equipment installation and alignment33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . BDrive characteristics - Multiple pinion drives35. . . . . . . . . . . . . . . . . . . . . . . . . . . CRim thickness/deflection38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DOpen gearing lubrication40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ESample problems44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FMaterial mechanical properties58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GOperation and maintenance59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HAusferritic ductile iron (ADI)61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IService factors67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JMethod for determination of dynamic factor with AGMA 2000-A8869. . . . . . . . Figures 1Rim thickness factor, KBm10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Dynamic factor, Kvm11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Hardness ratio factor, ZW13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Pinion proportion factor, KHpf15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Mesh alignment factor, KHma16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Allowable contact stress number for through hardened steel gears, HP18. . . 7Allowable bending stress number for through hardened steel gears, FP18. . . 8Allowable contact stress number for spheroidal graphitic iron gears, HP19. . 9Allowable bending stress number for spheroidal graphitic iron gears, FP19. . 10Hardening pattern obtainable on pinion teeth with induction hardening30. . . . 11Minimum effective case depth for carburized and induction hardened pinions, he min30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Steel and spheroidal graphitic iron pitting resistance stress cycle factor, ZN32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Steel and spheroidal graphitic iron bending strength stress cycle factor, YN32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 03:09:35 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/AGMA 6114- -A06AMERICAN NATIONAL STANDARD iv © AGMA 2006 - All rights reserved Tables 1Symbols and definitions4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Empirical constants: A, B, and C16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Allowable contact stress number, HP, for steel and spheroidal graphitic iron gears16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Allowable bending stress number, FP, for steel and spheroidal graphitic iron gears17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Metallurgical characteristics for steel pinions and gears20. . . . . . . . . . . . . . . . . 6Metallurgical characteristics for spheroidal graphitic iron gears23. . . . . . . . . . . 7Metallurgical characteristics for wrought carburized and hardened pinions24. 8Metallurgical characteristics for wrought induction hardened pinions27. . . . . . Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 03:09:35 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/AGMA 6114- -A06AMERICAN NATIONAL STANDARD v© AGMA 2006 - All rights reserved Foreword The foreword, footnotes and annexes, if any, in this document are provided for informational purposes only and are not to be construed as a part of AGMA Standard 6114-A06, Gear Power Rating for Cylindrical Shell and Trunnion Supported Equipment (Metric Edition). This standard presents formulas and information using ISO symbology and SI units. AGMA321.01was originally developedtocovergears usedprimarily forballand rodmills, and for kilns anddryers. Itwas approvedin October1943, andlater modifiedin June1946. In June 1951, AGMA 321.03 was approved as a standard. Further changes and additions wereapprovedinJune1959,andAGMA321.04wasissuedinMarch1960. AGMA321.05 was approved in March 1968 and issued in March 1970. InFebruary1979,themillgearingcommitteewasreorganizedtoreviewAGMA321.05and revise it in accordance with AGMA 218.01, Rating the Pitting Resistance and Bending Strength of Spur and Helical Involute Gear Teeth. With AGMA 218.01 as a guide, the committee submitted the first draft of ANSI/AGMA 6004-F88 in March 1984. ANSI/AGMA 6004-F88 superseded AGMA 321.05, Design Practice for Helical and Herringbone Gears for Cylindrical Grinding Mills, Kilns, Coolers, and Dryers.It was approved by the AGMA membership in January 1988 and approved as an American National Standard on May 31, 1988. ANSI/AGMA 6004 was not widely accepted by the industry and many continued to use AGMA 321.05. As such, the AGMA Mill Gearing began work on ANSI/AGMA 6114-A06 in November 2001. Changes to the standard include a new dynamic factor analysis as a functionoftransmissionaccuracynumber,revisedallowablestressnumbers,theuseofthe stress cycle factor in the rating practice, and ratings for gears made from spheroidal graphitic iron.Extensive discussions on new equipment installation and alignment, lubrication, and use of ausferritic ductile iron were added to the annex. Values for factors assigned in previous standards are not applicable to this Standard, nor are the values assigned in this Standard applicable to previous standards. The ability to design gears, and the knowledge and judgment required to properly evaluate the various rating factors comes primarily from years of accumulated experience in gearing. The detailed treatment of the general rating formulas for specific applications is best accomplished by those experienced in the field. ANSI/AGMA 6114-A06 supersedes ANSI/AGMA 6004-F88, Gear Power Rating for Cylindrical Grinding Mills, Kilns, Coolers and Dryers. The first draft of ANSI/AGMA 6114-A06 was made in November, 2001. It was approved by the AGMA membership in July 2006 and approved as an American National Standard on September 29, 2006. Suggestions for improvement of this standard will be welcome. They should be sent to the AmericanGearManufacturersAssociation,500MontgomeryStreet,Suite350,Alexandria, Virginia 22314. Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 03:09:35 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/AGMA 6114- -A06AMERICAN NATIONAL STANDARD vi © AGMA 2006 - All rights reserved PERSONNEL of the AGMA Mill Gearing Committee Chairman: Craig DaneckiRexnord Industries, LLC. . . . . . . . . . . . . . . . . . . . . . . . . . . . Vice Chairman: Gary A. BishHorsburgh -Spur gears with transverse contact ratio, , less than 1.0; -Spur or helical gears with transverse contact ratio, ,greater than 2.0; -Interferenceexistsbetweentipsofteethandroot fillets; -Teeth are pointed as defined by this standard, see clause 7; -Backlash is zero; -Undercut exists in an area above the theoretical start of active profile; -Therootprofilesaresteppedorirregular,ordevi- ate from the generated form. The YJfactor cal- culation uses the stress concentration factors developed by Dolan and Broghamer 1. These factors may not be valid for root forms which are not smooth curves. For root profiles which are stepped or irregular, other stress correction factors may be more appropriate; -The helix angle at the standard (reference) pitch diameterisgreaterthan20degreesforsinglehe- lical and 35 degrees for double helical. Fractures emanating from stress risers on the tooth profile, tip chipping, and failures of the gear blank through the web or rim should be analyzed by general machine design methods. 2 Normative references The following standards contain provisions which, throughreferenceinthistext,constituteprovisionsof this American National Standard.At the time of publication, the editions indicated were valid.All standards are subject to revision, and parties to agreemen
