Angular Contact Ball Bearing Ball Material Alloy Steel Bearing Industry Number 7210 Bore Diameter 50 mm Cage Material Steel Closure Open Contact Angle 40 Degrees Contact Bearing Type Angular Contact Lubricant Material Grease Oil Matched Bearing Type Not Matched/Single Bearing Maximum Speed 6 700 RPM Maximum Temperature 120 Degrees C Minimum Temperature -40 Degrees C Number of Rows One Outside Diameter 90 mm Overall Width 20 mm Ring Material Alloy Steel