Deep groove ball bearing is a kind of the most common rolling bearing. The basic type of deep groove ball bearing is composed of an outer ring, a ring, a group of steel ball and a group of cage. There are single and double row of two deep groove ball bearing type, single row deep groove ball bearing type code 6, code named 4 double deep groove ball bearing. It has the advantages of simple structure, convenient use, is most popular, the most widely used one kind of bearing.