Item: Radial Ball Bearing, Bearing Type: Double Shield, Bore Dia.: 40 mm, Bore Tolerance: +0/-0.012 mm, Outside Dia.: 90 mm, Outside Dia. Tolerance: +0/-0.015 mm, Width: 23 mm, ABEC Tolerance: 1, Dynamic Load Capacity: 9,100 lb., Static Load Capacity: 5,400 lb., Max. RPM: 9,200, Temp. Range: -40 Degrees to 350 Degrees F., Bearing Material: 52100 Chrome Steel, Cage Material: Pressed Steel, Shield Material: Steel, Lubrication: Polyrex EM Grease, Industry Number: 6308-ZZ C3