AGMA 925 PDF

As specified in AGMA , you can use this input window to define the probability of scuffing and wear as well as susceptibility to micropitting (frosting). Find the most up-to-date version of AGMA at Engineering AGMA A03 (R) Effect of Lubrication on Gear Surface Distress The purpose of this information sheet is to provide the user with information pertinent to.

Author: Nile Dushakar
Country: Bahamas
Language: English (Spanish)
Genre: Finance
Published (Last): 9 July 2017
Pages: 262
PDF File Size: 14.9 Mb
ePub File Size: 7.14 Mb
ISBN: 954-8-19435-534-1
Downloads: 3863
Price: Free* [*Free Regsitration Required]
Uploader: Mak

SCOPE This information sheet is designed to provide currently available tribological information pertaining to oil lubrication of industrial gears for power transmission applications. It is intended to serve as a general guideline and source of information about gear oils, their properties, and their general tribological behavior in gear contacts.

Manufacturers and end-users are encouraged, however, to 95 with their lubricant suppliers to address specific concerns or special issues that may not be covered here such as greases. The equations provided herein allow the user to calculate specific oil film thickness and instantaneous contact flash temperature for gears in service.

These two parameters are considered critical in defining areas of operation that may lead to unwanted surface distress.

AGMA – Articles, News and Company results for AGMA on

Surface distress may be scuffing adhesive wearfatigue micropitting and macropittingor excessive abrasive wear scoring. Each of these forms of surface distress may be influenced by the lubricant; the calculations are offered to help assess the potential risk involved with a given lubricant choice. Flow charts are included as aids to using the equations. It has been introduced as an aid to the gear manufacturing and user community.

Accumulation of feedback data will serve to enhance future developments and improved methods to evaluate lubricant related surface distress. One of the key parameters is the estimated film thickness.

AGMA 925 – Search Results

This is not a trivial calculation, but one that has significant impact on overall performance of the gear pair. It is considered in performance issues such agna scuffing, wear, and surface fatigue. This information sheet provides sufficient information about key lubricant parameters to enable the user to generate reasonable estimates about surface distress based on the collective knowledge available.

  LA GRANDE MAISON MOHAMMED DIB PDF

Blok [1] published his contact temperature equation in It ayma relatively unnoticed in the U.

AGMA A03 (R) – Effect of Lubrication on Gear Surface Distress

Kelley found it necessary to couple the coefficient of friction to surface roughness of the gear teeth. Kelley recognized the importance of load sharing by multiple pairs of teeth and gear tooth tip relief, but he did not offer equations to account for those variables.

Benedict and Kelley [5] published their equation for variable coefficient of friction derived from disc tests. The AGMA Aerospace Committee began investigating scuffing inand Lemanski [6] published results of a computer analysis that contains data for 90 spur and helical gearsets, and formed the terms for AGMA In addition, zgma added several improvements including:. The purpose of this information sheet is to provide the user with information pertinent to the lubrication of industrial metal gears for power transmission applications.

It is intended that this 95 serve as a general guideline and source of information about conventional lubricants, their properties, and their general tribological behavior in gear 295. Accumulation of feedback data will serve to enhance future developments and improved methods to evaluate lubricant related wear risks. 92 was clear from the work initiated on the revision of AGMA Standards C95 and C95 metric version that supporting information regarding lubricant properties and general tribological knowledge of contacting surfaces would aid 9255 the understanding of these standards.

The information would also provide the user with more tools to help make a more informed decision about the performance of a geared system. This information sheet provides sufficient information about the key lubricant parameters to enable the user to generate reasonable estimates about scuffing and wear based on the collective knowledge of theory available for these modes at this time.

  BARFUSSLAUFEN VERSTEHEN PDF

In Harmon Blok published his theory agms the relationship between contact temperature and scuffing. This went largely unnoticed in the U. The Blok flash temperature theory 9225 to receive serious consideration as a predictor of scuffing in gears. The AGMA Aerospace Committee began using all the available information to produce high quality products and help meet its long-term goal of manned space flight.

Specifically, the subcommittee targeted the effect lubrication may have on gear surface distress. As discussions evolved, it became clear that this should be a standalone document which will hopefully serve many other gear types.

This should be considered a work in progress as more is learned about the theories and understanding of the various parameters and how they affect the life of the gear. Suggestions for improvement of this standard will be welcome.

AGMA A03 reaffirmed January SCOPE This information sheet is designed to provide currently available tribological information pertaining to oil lubrication of industrial gears for power transmission applications.

In gama, Kelley [4] changed his surface roughness term slightly.

In addition, it added several improvements including: Helical gears were analyzed by resolving the load in the normal plane and distributing the normal load over the minimum length of the contact lines.

The semi-width of aga Hertzian contact band was calculated based on the normal relative radius of curvature; Derating factors for application, misalignment and dynamics were explicit input data; Options for coefficient of friction agms part of input data, including a constant 0. Quantity must be a positive whole number.