Single row deep groove ball bearings are the most representative structure in rolling bearings, widely used for various applications. In addition to radial load, they can also withstand axial load in two directions. Characterized by low friction torque, they are most suitable for applications requiring high-speed rotation, low noise, and low vibration. Apart from the open type, these bearings also come with steel plate dust covers, rubber sealing rings, or bearings with a stop ring on the outer diameter of the outer ring. Generally, steel plate stamped cages are used. For large-sized deep groove ball bearings, copper alloy machined cages are used. Machined cages are also used for high-speed rotation.