Powder metallurgy (P/MD) is a precision metal forming technology for producing simple or complex parts to net shape or
near net shape. In most cases, litle, if any machining is required. The mechanical properties of P/M materials are a direct
function of density, composition, and microstrucure. A systems approach to material and process selection permits the
development of a microstructure suitable for the intended application.
A recently activated AGMA, Metal Powder Industries Federation (MPIF) work group has been established to develop
standards and design guidelines for P/M gears. The current state of PM technology as related to gear design and
applications is reviewed. New materials and process technologies are discussed to demonstrate the comparability ofP/M
steel gears with cast or wrought steel components. The strengths and weakmnesses of the powder metallurgy process, as
pertaining to gear applications, is examined. Examples of P/M gears are presented along with the challenges facing the
technology.

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