Item: Radial Ball Bearing, Bearing Type: Sealed, Bore Dia.: 55 mm, Bore Tolerance: +0/-.007 mm, Outside Dia.: 120 mm, Outside Dia. Tolerance: +0/-11 micron, Width: 29 mm, ABEC Tolerance: 1, Dynamic Load Capacity: 16,700 lb., Static Load Capacity: 10,100 lb., Max. RPM: 8,000, Temp. Range: -40 Degrees to 212 Degrees F., Bearing Material: 52100 Chrome Steel, Cage Material: Pressed Steel, Seal Material: Synthetic Rubber, Lubrication: EM Grease, Industry Number: 6311-2RS C3