This standard describes the specification data required to adequately inform the producer of powder metallurgy (P/M) gears about the gear design features desired by the purchaser. It also describes some of the related industry practices which commonly apply unless replaced by written agreement between producer and purchaser.
TYPES OF GEARS
The general specifications in this standard cover selected types of gears made by the P/M process. Specifications on gear tooth geometry are described in detail for external spur and helical gears and for straight bevel gears. Similar specifications can also be applied to other types of gears, such as internal gears, with the substitution and addition of the required gear feature data.
TYPES OF P/M PROCESSES
This standard applies to gears made by the conventional P/M process consisting of compaction followed by sintering and, in some cases, by post sintering treatments. Gears made by metal injection molding (MIM) or other P/M processes may require other specifications or practices.
[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 ANSI/AGMA Standard 6008--A98, Specifications for Powder Metallurgy Gears.]
The AGMA Powder Metallurgy Gearing Committee was organized in 1993 with the support of the Metal Powder Industries Federation (MPIF). The work of the Committee is directed toward merging the technology of powder metallurgy (P/M) gearing with the technologies of the more traditional types of gearing.
The Committee, responding to the widely recognized need for improving the technical communication between powder metallurgy gear purchasers and producers, selected as its first project this specification standard. The primary objective of this standard is to increase understanding by the gear purchaser of the responsibility to thoroughly define the gear requirements to the gear producer.
This version was approved by the AGMA membership in November 1997. It was approved as an American National Standard on September 10, 1998.
Suggestions for 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.
The following standards contain provisions which, through reference in this text, constitute provisions of this American National Standard. At the time of publication, the editions indicated were valid. 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.
The gear terms used are defined in the following standards:
ISBN: 1-55589-713-4 Pages: 17
AGMA390.03a, Gear Handbook -- Gear Classification, Materials and Measuring Methods for Bevel, Hypoid, Fine Pitch Wormgearing and Racks Only as Unassembled Gears
AGMA 910--C90, Formats for Fine--Pitch Gear Specification Data
ANSI/AGMA 1003--G93, Tooth Proportions for Fine--Pitch, Spur and Helical Gearing
ANSI/AGMA 2000--A88, Gear Classification and Inspection Handbook -- Tolerances and Measuring Methods for Unassembled Spur and Helical Gears (Including Metric Equivalents)
ANSI/AGMA 2002--B88, Tooth Thickness Specification and Measurement
ANSI/ASME Y14.5M (1994), Dimensioning and Tolerancing
MPIF Standard 35 (1997), Materials Standards for P/M Structural Parts
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