Spherical Roller Bearing Extra Capacity Shaker Screen Bearing 100x215x73mm ECB452320 M2/W502 . This SKF shaker screen spherical roller bearing has a brass cage, a C4 radial clearance, a P5 precision outer ring with lubrication groove and three oil holes, and a straight bore suitable for applications that support high radial and oscillating axial loads, such as in vibrating screens.