NAICS 332991: Ball and Roller Bearing Manufacturing

NAICS 332991 – Ball and Roller Bearing Manufacturing encompasses the precision fabrication of rolling-element bearings, including ball bearings, cylindrical, tapered, and spherical roller bearings, and related components used in high-performance mechanical systems. These bearings are critical to the operation of aerospace propulsion systems, ground vehicle transmissions, naval propulsion shafts, missile guidance mechanisms, and heavy-duty military equipment, where load capacity, rotational precision, and resistance to extreme thermal and mechanical stress are paramount.