Deep groove ball bearing is bearing the most common types. Prototype deep groove ball bearing by a case and an inner ring, a group of steel ball and a set of cage composition. Deep groove ball bearing type have single row and double rows two kinds, single row deep groove ball bearing type code for 6, double row deep groove ball bearing code is 4. Its structure is simple, easy to use, is the production of the most common and most widely used a kind of bearing .