A deep groove ball bearing has steel balls as rolling elements and a spherical raceway. It is mainly used to bear radial loads but can also withstand a certain amount of axial load in any direction. When the radial clearance of the bearing is increased within a certain range, this type of bearing has the properties of an angular contact ball bearing and can also bear larger axial loads. Compared with cylindrical roller bearings of the same size, deep groove ball bearings have lower load capacity but higher rotational speed. They can be applied to equipment with high, medium and low rotational speeds, and are widely used in high-speed rotation equipment such as motors and engines.