This category encompasses bearings that support rotating shafts in industrial machinery and reduce friction. It includes ball bearings, roller bearings, plain bearings, and thrust bearings incorporated into industrial machinery such as machine tools, conveying equipment, packaging machinery, and printing machinery. These are critical mechanical components including deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings, tapered roller bearings, and self-aligning bearings that determine rotational accuracy and durability of machinery. Used as spindle bearings, feed shaft bearings, and motor bearings, they are procured for assembly and maintenance by machinery manufacturers and as replacement parts during equipment modifications. Distinguished from general mechanical component bearings, this category targets high-precision, high-load capacity products specifically designed for industrial machinery applications.