Angular Contact Ball Bearing Bearing Industry Number 3211/5211 Bore Diameter 55 mm Cage Material Steel Closure Open Contact Angle 30 Degrees Contact Bearing Type Angular Contact Matched Bearing Type Not Matched/Single Bearing Maximum Speed 7 100 RPM Maximum Temperature 150 Degrees C Minimum Temperature -30 Degrees C Number of Rows Two Outside Diameter 100 mm Overall Width 33.3 mm Ring Material Alloy Steel System of Measurement Metric ABEC Rating 3