Deep groove ball bearings are suitable for high speed operation, are very durable and do not require frequent maintenance. This type of bearing has a small friction coefficient,  used in precision instruments, low-noise motors, automobiles, motorcycles and general machinery and other industries, it is the most widely used type of bearing in the machinery industry. It mainly bears radial load, and can also bear a certain amount of axial load.
The most common deep groove ball series are 6000 series, 6200 series, 6300 series, 6400 series.