standard share much in common with DIN. This paper con- siders BS , the draft ISO standard , and AGMA. Since this review was written. This standard specifies a method for rating the pitting resistance and bending .. In AGMA the values for Life Factor, CL and KL, Dynamic Factor, Cv and. Documents Similar To AGMA AGMA A Uploaded by. simone. castagnetti · AGMA. Uploaded by. Dipak · ANSI_AGMA_A Uploaded.
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These factors may not be valid for root forms which are not smooth curves. The effect of this undercut is to move the highest point of single tooth contact, negating the assumption of this calculation method. This standard is intended for use by the experienced gear designer, capable of selecting reasonable values for the factors. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
Undercut exists in an area above the theoretical start of active profile.
Item Detail – ANSI/AGMA B15
For root profiles which are stepped or irregular, other stress correction factors may be more appropriate. The root profiles are stepped or irregular. This AGMA Standard and related publications are based on typical or average data, conditions, or applications. For dated references, only the edition cited applies. This standard is intended for use by experienced gear designers, capable of selecting reasonable values for the rating factors. It was approved as an American National Standard on May 20, It provides the basis from which more detailed AGMA application standards are developed, and provides a basis for calculation of approximate ratings in the absence of such standards.
It also reflects a change to clause 10, dealing with the relationship between service factor and stress cycle factor. Single helical designs with face widths as large as 60 inches and double helical designs with effective face widths as large as 90 inches are not uncommon in these applications. However, agreement could not be reached on the total content. Exceptions The formulas of this standard are not applicable to other types of gear tooth deterioration such as plastic yielding, wear, case crushing and welding.
Applicability Applications include but are not limited to, hot mills and cold mills, roughing and finishing stands: The gear designer or manufacturer is not responsible for stndard total system unless such a requirement is clearly identified in the contractual agreement. Quantity must be a positive whole number.
Item Detail – ANSI/AGMA A13 (reaffirmed December 17, )
SCOPE This part of Standrd specifies the information and standardized conditions necessary for the calculation of the service life or safety factors for a required life of gears subject to variable loading. SCOPE This Standard provides a method for determining the power rating of gear sets used in main mill drives, pinion stands, and combination units used for the reduction of material size in metal rolling mills.
Rating formulas This standard provides a method by which different gear designs can be rated and compared. Mixing values from other standards with those from this standard could lead to erroneous ratings.
The purpose of this standard is to establish a common base for rating various types of gears for differing applications, and to encourage themaximum practical degree of uniformity and consistency between rating practices within the gear industry. The constants and coefficients used in curve fitting often have significant digits in excess of those inferred by the reliability of the empirical data.
The gear designer or manufacturer is not responsible for the total system unless such a requirement is clearly identified xgma the contractual agreement. At the time of publication, the editions indicated were valid. Values for factors assigned in 128.01 standards are not applicable to this standard nor are the values assigned in this standard applicable to other standards.
Exceptions The formulas of this standard are not standrad to determine rating capacity for other types of gear tooth deterioration such as plastic deformation, adhesive or abrasive wear, subcase fatigue, and scuffing.
The formulas of this standard are not applicable when any of the following conditions exist: These rating formulas are applicable for rating the pitting atma and bending strength of external involute gear teeth operating on parallel axes with adjustable center distances.
Suggestions for improvement of this standard will be welcome. The detailed treatment of the general rating formulas for specific applications is best accomplished by those experienced in the field. Where empirical values for rating factors are given by curves, curve-fitting equations are provided to facilitate computer programming.
The formulas are applicable to steel, ductile iron agmw graphitic ironand austempered ductile iron ADI with machined spur, single helical, double helical, or herringbone gear teeth. At the time of development, the editions were valid.
Limitations The formulae of this standard are not applicable to other types of gear tooth deterioration such as wear, case crushing, and welding.
SCOPE Applicability This standard provides a method to determine the power rating of gear sets with spur and helical conventional pinions and spur self-aligning pinions for cylindrical grinding mills, kilns, coolers, and dryers. It is not intended for use by the engineering public at large. Unless otherwise specified by contractual agreement, the connected motor nameplate power including motor service factor shall be used to determine service factors as defined in Clause Design considerations to prevent fractures emanating from stress risers on the tooth profile, tip chipping, and failures of the gear blank through the web or hub should be analyzed by general machine design methods.
Formulas do not apply to external loads such as dropped charges, electrical short circuits and earthquakes. These fundamental rating formulas are applicable for rating the pitting resistance and bending strength of internal and external spur and helical involute gear teeth operating on parallel axes.
This AGMA Standard and related publications are based on typical or average data, conditions, or applications. It was approved in Octoberand later modified in June