21307CC W33 Spherical Roller Bearing 35×80×21mm for Heavy Duty Industrial Machinery Product Overview The 21307CC W33 Spherical Roller Bearing is designed for heavy-duty industrial applications requiring high radial load capacity, self-aligning performance, and efficient lubrication. Featuring a double-row spherical roller structure, CC-type pressed steel cage, and W33 lubrication groove with oil holes on the outer ring, it ensures reliable operation under demanding working