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ANSI/AGMA 2001- D04
(Revision of
ANSI/AGMA 2001--C95)
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AMERICAN NATIONAL STANDARD
ANSI/AGMA 2001- D04
Fundamental Rating Factors and
Calculation Methods for Involute Spur and
Helical Gear Teeth
Copyright American Gear Manufacturers Association
Provided by IHS under license with AGMA
No reproduction or networking permitted without license from IHS
Licensee=Electric Boat/9993263100
Not for Resale, 06/07/2005 06:58:52 MDT
American
National
Standard
Fundamental Rating Factors and Calculation Methods for Involute Spur and
Helical Gear Teeth
ANSI/AGMA 2001--D04
[Revision of ANSI/AGMA 2001--C95]
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 Review,
substantial agreement has been reached by directly and materially affected 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 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
Standard in the name of the American National Standards Institute. Requests for interpretation of this standard should be addressed to the American Gear Manufacturers
Association.
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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 2001--D04, Fundamental Rating Factors and Calculation Methods for Involute Spur and Helical Gear Teeth, published by the American Gear Manufacturers Association, 500 Montgomery Street, Suite 350, Alexandria, Virginia
22314,
http://www.agma.org.]
Approved December 28, 2004
ABSTRACT
This standard specifies a method for rating the pitting resistance and bending strength of spur and helical involute gear pairs. A detailed discussion of factors influencing gear survival and calculation methods are provided.
Published by
American Gear Manufacturers Association
500 Montgomery Street, Suite 350, Alexandria, Virginia 22314
Copyright  2004 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--839--4
ii
Copyright American Gear Manufacturers Association
Provided by IHS under license with AGMA
No reproduction or networking permitted without license from IHS
Licensee=Electric Boat/9993263100
Not for Resale, 06/07/2005 06:58:52 MDT
AMERICAN NATIONAL STANDARD
ANSI/AGMA 2001--D04
Contents
Page
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Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
1
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2
Normative references, definitions and symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
4
Criteria for tooth capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5
Fundamental rating formulas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6
Geometry factors, I and J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7
Transmitted tangential load, Wt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8
Dynamic factor, Kv . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9
Overload factor, Ko . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
10 Service factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
11 Safety factors, SH and SF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
12 Elastic coefficient, Cp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
13 Surface condition factor, Cf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
14 Hardness ratio factor, CH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
15 Load distribution factor, Km . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
16 Allowable stress numbers, sac and sat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
17 Stress cycle factors, ZN and YN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
18 Reliability factor, KR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
19 Temperature factor, KT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
20 Size factor, Ks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Annexes