Angular Contact Ball Bearing Bearing Industry Number 3304/5304 Bore Diameter 20 mm Cage Material PA66 Closure Open Contact Angle 30 Degrees Contact Bearing Type Angular Contact Matched Bearing Type Not Matched/Single Bearing Maximum Speed 14 700 RPM Maximum Temperature 120 Degrees C Minimum Temperature -30 Degrees C Number of Rows Two Outside Diameter 52 mm Overall Width 22.2 mm Ring Material Alloy Steel System of Measurement Metric ABEC Rating 3