Official definition

This industry comprises establishments primarily engaged in manufacturing turbines, power transmission equipment, and internal combustion engines (except automotive gasoline and aircraft). Illustrative Examples: Clutches and brakes (except electromagnetic industrial controls, motor vehicle) manufacturing Diesel and semidiesel engines manufacturing Electric outboard motors manufacturing Internal combustion engines for hybrid drive systems (except automotive) manufacturing Plain bearings (except internal combustion engine) manufacturing Power transmission pulleys manufacturing Plain bushings (except internal combustion engine) manufacturing Speed changers (i.e., power transmission equipment) manufacturing Speed reducers (i.e., power transmission equipment) manufacturing Turbine generator set units manufacturing Universal joints (except aircraft, motor vehicle) manufacturing Cross-References. Establishments primarily engaged in--