... lubrication is difficult, such as the area between the roller heads and inner ring rib, the sliding surfaces between cage and guide sleeve, etc ... Thrust Roller BearingThrust Roller bearing is used to bear the axial load of axis and radial load,but radial ... )Cage: Brass,Nylon4)Hardness : 59-63 HRCApplication:Oil rig,the system of iron and steel machinery,hydroelectric generators,vertical motors ...