This standard describes the specification data required to adequately inform the manufacturer of powder metallurgy (PM) 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 manufacturer and purchaser.

Types of gears

The general specifications in this standard cover selected types of gears made by the PM process. Specifications on gear tooth geometry are described in detail for external and internal spur and helical gears and for straight bevel gears. Similar specifications can also be applied to other types of gears, such as face gears, with the substitution and addition of the required gear feature data.

Types of PM processes

This standard applies to gears made by the conventional PM process consisting of compaction followed by sintering and, in some cases, by post sintering treatments. Gears made by other PM processes may require other specifications or practices, such as additive manufacturing methods. Gears made by metal injection molding (MIM) processes are beyond the scope of this standard.

Exclusions

This standard only applies to gears made from steel and steel alloys, excluding gears made from bronze, aluminum, and stainless steel alloys.