Angular Contact Ball Bearing Bearing Industry Number 3204/5204 Bore Diameter 20 mm Cage Material Steel Closure Open Contact Angle 30 Degrees Contact Bearing Type Angular Contact Matched Bearing Type Not Matched/Single Bearing Maximum Speed 16 100 RPM Maximum Temperature 120 Degrees C Minimum Temperature -30 Degrees C Number of Rows Two Outside Diameter 47 mm Overall Width 20.6 mm Ring Material Alloy Steel System of Measurement Metric ABEC Rating 3