The common type of deep groove ball bearing is consist of a outer ring, an inner ring, a group of balls and a cage. It can be divided into two
types, open and sealed designs. The open design bearings without any sealed, but for the sealed design, there are many kind types, including dust proof sealed (with Z, ZZ suffix), oil proof sealed (with RS, 2RS, RZ, 2RZ), contact type and non-contact type. Otherwise there are also some special types such as with snap ring on the outer ring bearing (with N suffix) and wide inner ring type bearing (with WB suffix). Deep groove ball bearing mainly support the radial loading, but at the same time it can also support both radial and axial loading. Deep groove ball bearing with very small coefficient and with the very highly speed limited of revolution, it can used in many kind of applications.