LFR5201-12KDD 12mm ID x 35mm U Groove Track Roller Bearing TrackLFR5201 12Kdd 12mm U Groove Guide Bearing One Bearing LFR5201 12KDD 12mm ID x 35mm U Groove Track Roller Bearing, Bearing inner diameter is 12mm, Bearing outer diameter is 35mm and Bearing width is 15. 9mm. Item: LFR5201 12KDD Bearing Type: UGroove Track Roller Bearing Closure: 2 Metal Shields Quantity: One Bearing Dynamic Load Rating Cw: 8. 4 KN Static Load rating Cow: 5 KN Dimensions (mm) dw d D C B A rs 12 12 35 15. 9 15. 9 21. 75 0. 3