Sealed deep groove ball bearings are a type of radial deep groove ball bearing that have an additional sealing element to prevent the ingress of dirt, dust, and other contaminants. These bearings are used in applications where the bearing may be exposed to harsh environments or where the bearing may be required to operate in conditions with high levels of contamination.

There are two main types of sealed deep groove ball bearings: single-sealed bearings and double-sealed bearings. Single-sealed bearings have a single sealing element on one side of the bearing, while double-sealed bearings have sealing elements on both sides of the bearing.

The sealing element used in sealed deep groove ball bearings can be a rubber seal, a metal shield, or a combination of both. The sealing element is typically located on the outer ring of the bearing and is designed to provide a tight seal around the circumference of the bearing.

Sealed deep groove ball bearings offer a number of benefits, including improved reliability and longer service life in harsh environments. They are widely used in a variety of applications, including agricultural equipment, construction machinery, and industrial equipment.