Item: Radial Ball Bearing, Bearing Type: Shielded, Bore Dia.: 55 mm, Bore Tolerance: +0/-.012 mm, Outside Dia.: 100 mm, Outside Dia. Tolerance: +0/-11 micron, Width: 21 mm, ABEC Tolerance: 1, Dynamic Load Capacity: 10,400 lb., Static Load Capacity: 6,500 lb., Max. RPM: 9,000, Temp. Range: -40 Degrees to 212 Degrees F., Bearing Material: 52100 Chrome Steel, Cage Material: Pressed Steel, Shield Material: Stamped Steel, Lubrication: EM Poly Grease, Industry Number: 6211-2Z C3