As the loaded ball bearings than deep groove ball bearings are many in the Ball Rolling Road was contacted angular contact, so can bear the load than large deep groove ball bearings which can withstand axial load, are widely used in steel rolling machines work roll and roll support, the mechanical effect of axial positioning role. The radial bearings can not afford, therefore, the bearing diameter and the outer diameter between Shell should have enough space. The bearing axial clearance at the factory before the identification, users do not need to make further adjustments. The company can manufacture international and diameter, diameter, width of non-standard angular contact bearings.