Precision Deep Groove Ball Bearing is the most representative rolling bearing. The friction coefficient of this type of bearing is small and the limit speed is high. Its structure is simple and the manufacture cost is low. A comparatively high precision can be obtained. The size and structures differ a lot. This type of bearing are applied in the fields such as high-precision test equipment, low-noise motor, aotumobile, motorcycle and general machinery and is the most widely used type of bearing in machinery industry. It mainly bears negative radial load and can bear certain axial load.

When selecting a comparatively large radial clearance the axial load ability also increases. The contact angle is zero when the bearing bears load only in the radial direction. The contact angle is larger than zero when the bearing bears load in the axial direction. Ram type cage, car body cage and nylon cage are generally adopted.

After the Precision Deep Groove Ball Bearing is installed on the roller it can limit the axial displacement of the axis and housing in two directions within axial clearance so it can position in two directions. Besides this type of bearing has a certain ability of self-aligning. It can still work normally when the relative angle between the bearing and the housing ranges from 2 degrees to 10 degrees. But it has a certain effects on bearing life. The cages of Precision Deep Groove Ball Bearing are mostly pressed ribbon cage. Machinery solid cage is often adopted on large bearing.

Precision Deep Groove Ball Bearing is the most common rolling bearing. Its structure is simple and it is convenient to use. It is mainly used to bear radial load. When the radial load increases it has a certain performance of Angular Contact Ball Bearing. It can bear combined load in radial and axial direction. It can also bear load only in axial direction under comparatively high speed and when it is not proper to adopt Thrust Ball Bearing. Compared with other type of bearing with the same specified size the friction coefficient of Precision Deep Groove Ball Bearing is small. Its limit speed is high but the impact resistance is low. So it is not proper to bear heavy load.