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 for parts bearing radial load or combined load of radial and axial at the same time. It can also be used for parts bearing axial load, such as small power motor, automobile and tractor gearbox, machine tool gearbox, general machines, tools, etc.