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 machine, tools, etc.

The basic deep groove ball bearing consists of an outer ring, an inner ring, a set of steel balls and a set of retaining frame. There are two types of deep groove ball bearings: single row and double row. The structure of deep groove ball is also divided into seal and open structure. Open type means that the bearing does not have sealing structure, and sealed deep groove ball is divided into dust seal and oil proof seal. The material of dust seal cover is steel plate stamping, which can only prevent dust from entering bearing raceway. The oil proof type is the contact oil seal, which can effectively prevent the grease in the bearing from overflowing.

The type code of single row deep groove ball bearing is 6 and that of double row deep groove ball bearing is 4. Its structure is simple, easy to use, is the most common production, the most widely used type of bearing.