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.
1.1 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.
1.2 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. Gearsmade by metal injection
molding (MIM) or other P/M processes may require
other specifications or practices.