6311ZZC3 Koyo Ball Bearing, SheildedSpecifications Brand Koyo Seiko Company, LTD Manufacturer Part Number 6311ZZC3 Group Deep Groove Ball Bearings Type Shielded (ZZ) Bore Inside Diameter (d) 55 mm Housing Outside Diameter (D) 120 mm Width (B) 29 mm Minimum Radius (r) 2 mm Operating Temperature 30 to 110C Cage Type Pressed Steel Cage Configuration Single row Tolerances JIS B 1514 Allowable Misalignment . 002 3 . 003 4 rad ( 8 12 ) Basic Load Rating Cr 71. 6 kN C0r 45 kN Fatigue Load