This document identifies and defines terms used, illustrates configurations, and gives a nomenclature of components for machine-fed woody biomass reduction chippers, grinders, and shredders used in forestry. It aims to establish a uniform description of the various configurations of these types of forestry machines.

Machines covered by this document include:

—     drum chippers;

—     disc chippers;

—     screw chippers;

—     horizontal grinders;

—     tub grinders;

—     shredders.

Chippers, grinders, and shredders that are manually fed are not covered by this document.