Uploader: David
Country: Switzerland
Uploaded: Jul 31, 2018
Price: Free
Rating: Based on 1 user ratings

Please, verify you are not robot to load rest of pages

download agma 908 b89 pdf

Return to Menu
AGMA 908---B89
(Revision of AGMA 226.01)
April 1989
(Reaffirmed August 1999)
AMERICAN GEAR MANUFACTURERS ASSOCIATION
Geometry Factors for Determining the Pitting Resistance
and Bending Strength of Spur, Helical and Herringbone
Gear Teeth
AGMA INFORMATION SHEET
(This Information Sheet is not an AGMA Standard)
INFORMATION SHEET
Geometry Factors for Determining the Pitting Resistance and Bending Strength of Spur,
Helical and Herringbone Gear Teeth
AGMA 908---B89
(Revision of AGMA 226.01 1984)
[Tables or other self---supporting sections may be quoted or extracted in their entirety. Credit line should
read: Extracted from AGMA Standard 908---B89, INFORMATION SHEET, Geometry Factors for Determining
the Pitting Resistance and Bending Strength of Spur, Helical and Herringbone Gear Teeth, with the permission of the
publisher, American Gear Manufacturers Association, 1500 King Street, Suite 201, Alexandria, Virginia
22314.]
AGMA standards are subject to constant improvement, revision or withdrawal as dictated by experience.
Any person who refers to any AGMA Technical Publication should determine that it is the latest information
available from the Association on the subject.
Suggestions for the improvement of this Standard will be welcome. They should be sent to the American
Gear Manufacturers Association, 1500 King Street, Suite 201, Alexandria, Virginia 22314.
ABSTRACT:
This Information Sheet gives the equations for calculating the pitting resistance geometry factor, I, for
external and internal spur and helical gears, and the bending strength geometry factor, J, for external spur and
helical gears that are generated by rack---type tools (hobs, rack cutters or generating grinding wheels) or
pinion---type tools (shaper cutters). The Information Sheet also includes charts which provide geometry factors,
I and J, for a range of typical gear sets and tooth forms.
Copyright E, 1989
American Gear Manufacturers Assocation
1500 King Street, Suite 201
Alexandria, Virginia 22314
April, 1989
ISBN: 1---55589---525---5
AGMA
ii
908---B89
Geometry Factors for Determining the Pitting Resistance and Bending Strength of Spur and Helical Gear Teeth
FOREWORD
[The foreword, footnotes, and appendices are provided for informational purposes only and should not be
construed as part of American Gear Manufacturers Association Information Sheet 908---B89, Geometry Factors
for Determining the Pitting Resistance and Bending Strength of Spur, Helical and Herringbone Gear Teeth.]
This Information Sheet, AGMA 908---B89, was prepared to assist designers making preliminary design
studies, and to present data that might prove useful for those designers without access to computer programs.
The tables for geometry factors contained in this Information Sheet do not cover all tooth forms, pressure
angles, and pinion and gear modifications, and are not applicable to all gear designs. However, information is
also contained for determining geometry factors for other conditions and applications. It is hoped that
sufficient geometry factor data is included to be of help to the majority of gear designers.
Geometry factors for strength were first published in Information Sheet AGMA 225.01, March, 1959,
Strength of Spur, Helical, Herringbone and Bevel Gear Teeth. Additional geometry factors were later published in
Standards AGMA 220.02, AGMA 221.02, AGMA 222.02, and AGMA 223.01. AGMA Technical Paper 229.07,
October, 1963, Spur and Helical Gear Geometry Factors, contained many geometry factors not previously
published. Due to the number of requests for this paper, it was decided to publish the data in the form of an
Information Sheet which became AGMA 226.01, Geometry Factors for Determining the Strength of Spur, Helical,
Herringbone and Bevel Gear Teeth.
AGMA 218.01, AGMA Standard for Rating the Pitting Resistance and Bending Strength of Spur and Helical
Involute Gear Teeth, was published with the methods for determining the geometry factors. When AGMA
218.01 was revised as ANSI/AGMA 2001---B88, the calculation procedures for Geometry Factors, I and J, were
transferred to this revision of the Geometry Factor Information Sheet. The values of I and J factors obtained
using the methods of this Information sheet are the same as those of AGMA 218.01. The calculation procedure
for I was simplified, but the end result is mathematically identical. Also, the calculation of J was modified to
include shaper cutters and an equation was added for the addendum modification coefficient, x, previously
undefined and all too often misunderstood. Appendices have been added to document the historical derivation
of both I and J.
Because an analytical method for calculating the Bending Strength Geometry Factor, J, is now available, the
layout procedure for establishing J has been eliminated from this document. All references to geometry factors
for bevel gears have been removed. This information is now available in AGMA 2003---A86, Rating the Pitting
Resistance and Bending Strength of Generated Straight Bevel, ZEROL Bevel and Spiral Bevel Gear Teeth.
The first draft of this Information Sheet, AGMA 908---B89, was presented to the Gear Rating Committee in
August, 1987. It was approved by the AGMA Gear Rating Committee on February 24, 1989, after several
revisions. It was approved for publication by the AGMA Technical Division Executive Committee on April
21,1989.
AGMA
iii
908---B89
Geometry Factors for Determining the Pitting Resistance and Bending Strength of Spur and Helical Gear Teeth
PERSONNEL of the AGMA Committee for Gear Rating
Chairman: J. Bentley (Peerless---Winsmith)
Vice Chairman: O. LaBath (Cincinnati Gear )
ACTIVE MEMBERS
M. Antosiewicz (Falk)
J. D. Black (General Motors/AGT)
E. J. Bodensieck (Bodensieck Engineering)
W. A. Bradley (AGMA)
R. Calvert (Morgan Construction)
A. S. Cohen (Engranes y Maquinaria)
J. DeMarais (Bison Gear)
R. Donoho (Clark Equipment)
R. J. Drago (Boeing)
D. W. Dudley (Honorary Member)
R. Errichello (Academic Member)
H. Hagan (Nuttall Gear)
N. Hulse (General Electric)
H. Johnson (Browning Co.)
R. D. Kemp (Kymmene---Stromberg Santasalo)
J. C. Leming (Arrow Gear) (Deceased)