Item: Radial Ball Bearing, Bearing Type: Sealed, Bore Dia.: 55 mm, Bore Tolerance: +0/-.015 mm, Outside Dia.: 90 mm, Outside Dia. Tolerance: +0/-.015 mm, Width: 18 mm, ABEC Tolerance: 1, Dynamic Load Capacity: 6,650 lb., Static Load Capacity: 4,770 lb., Max. Load Axial: 2,385 lb., Max. RPM: 4,500, Temp. Range: -40 Degrees to 212 Degrees F., Bearing Material: 52100 Chrome Steel, Cage Material: Pressed Steel, Seal Material: Synthetic Rubber, Lubrication: EM Poly Grease, Industry Number: 6011-2RS JEM C3