Is the most common type of a rolling bearing. The basic type of deep groove ball bearings into an outer ring, an inner ring, a set of steel balls, and a group of holding architecture. Deep groove ball bearing type single and double row two, single row deep groove ball bearing type code for 6, double row deep groove ball bearings Code 4. Its structure is simple, easy to use, is the production of the most common, the most widely used type of bearings.