Roller bearing is a kind of the rolling element bearing, and is one of the most widely used bearings in modern machinery. It relies on rolling contact between the main components to support the rotating parts. Roller bearings have the advantages of small starting torque, high rotation accuracy, and convenience for selection and assembly, etc. Different roller bearings can withstand different radial and axial forces. When selecting a roller bearing, the choice should be made according to the specific working conditions. Roller bearings are mostly standardized. At present, roller bearings mainly include tapered roller bearings, cylindrical roller bearings, self-aligning roller bearings and thrust roller bearings. ISUTAMI can provide most types of roller bearings in standard specifications, including inch and metric sizes.