Deep groove ball bearings are the most widely used type of rolling bearings. They mainly bear radial load, but can also bear radial load and axial load at the same time. The single row deep groove ball bearing type code is 6, and the double row deep groove ball bearing type code is 4. It is characterized by low frictional resistance and high speed. It can be used on parts that bear radial load or a combined load that acts on both radial and axial directions. It can also be used on parts that bear axial load, such as low-power motors, Automobile and tractor gearboxes, machine tool gearboxes, general machines, tools, etc.