The convex shape of the Bearing Inserts outer ring along with the concave sphered shape inside the housing gives this UCFC207-20 Oval Flanged Unit the ability to self-align
a metal shield on both sides of the bearing and a larger than normal radial internal clearance
This 7311-B-MP bearing is a single row angular contact bearings with a modified internal construction and a solid brass cage
Medium Series 40mm - Bore Size Modified Internal Construction with a 30° Contact Angle X-Life Open Type Steel Cage Normal Internal Clearance
79 48 CTR SU L P3 Series - NSK - Ultra Light Bore Size - 240mm 15 Degree Contact Angle Single Universal Light Preload Precision Rating
23972CAMKE4 - NSK Spherical Roller Bearing - 360x480x90mm 317RSSHoffmann The convex shape of theThis 23972CAMKE4 bearing is a Spherical Roller Bearing with a guide ring centred on a retaining flanged inner ring, a machined brass cage, an annular groove in the outer ring with three lubrication holes, a 1: 12 tapered bore and a standard radial internal clearance. The bearing's dimensions are 360x480x90. 239 72 CAM K E4 Extra Light 360mm Bore Size One Piece Brass Cage, Guide Ring 1: 12 Tapered Bore Groove & Holes, Outer Normal Internal Clearance