Item: Radial Ball Bearing, Bearing Type: Shielded, Bore Dia.: 50 mm, Bore Tolerance: +0/-.01 mm, Outside Dia.: 90 mm, Outside Dia. Tolerance: +0/-11 micron, Width: 20 mm, ABEC Tolerance: 1, Dynamic Load Capacity: 8,300 lb., Static Load Capacity: 5,200 lb., Max. RPM: 10,000, Temp. Range: -40 Degrees to 212 Degrees F., Bearing Material: 52100 Chrome Steel, Cage Material: Pressed Steel, Shield Material: Pressed Steel, Lubrication: EM Poly Grease, Industry Number 6210-ZZ C3