Deep groove ball bearing (GB / T 276-2003), formerly known as single row radial ball bearing, is the most widely used rolling bearing. It is characterized by low friction resistance and high speed. It can be used on parts that bear radial load or combined load of radial and axial action at the same time, and can also be used for parts bearing axial load, such as low-power motor, automobile and tractor gearbox, machine tool gearbox, general machines, tools, etc