The angular contact ball bearing is divided into angular ball bearing double row angular contact ball bearing and four poing contact ball bearin,.

        It can bear radial and axial loads at  the same time and can bear pure axial load sa well wity higher limiting speeds.The capability of bearing axial load is detemined by the degree of contact angle , The bigger the contact angles,the bigger the axial load can be borne .The contact angles are classified as 15.   ,25.   ,40.  ,When the bearing bears radial  load ,additional axial  force will occur . There fore a  relevant axial load in the opposite direction must be  applied. The bearings the should  be used in general. In connection with mountage in pairs,there are threekinds of mountages, namily, back to back, face to face and in series.

      When the contact angle for the double row angular contact ball bearing is 30. , it can bear bigger radial and axial  bidirectional combined  loads and  moment load with radial load in the main . The bearing is mainly used in the units for restriction  of bidirebctional  axial displacemetn of shaft  or housing. Double row angular contact ball bearings are divided into two structures-one  outer ring with two inner rings and two outer rings with one inner ring.

      Four point contact ball bearing is seperation type  bearing,which is divided into types-two halfed outer rings with one inner ring and two halfed inner rings with one outer ring. The contact angles are all 35.  , When pure axial load is applied ,steed balls contact ring raceway  at  two  points. The bearing of this kind can bear radial load and axial load in any direction or  combined radial ,axial  load ,and can bear  bidirectional  axiad load sa well with performance of both single row and  double contact ball bearings. The limiting speeds of the bearing are higher.

     Beraings of this class are used  in  rolling  mills , machine tools  spindle,phneumatic  machinery, printing  machinery and  other machinery.