Angular Contact Ball Bearing Bearing Industry Number 3310/5310 Bore Diameter 50 mm Cage Material Steel Closure Open Contact Angle 30 Degrees Contact Bearing Type Angular Contact Matched Bearing Type Not Matched/Single Bearing Maximum Speed 6 500 RPM Maximum Temperature 150 Degrees C Minimum Temperature -30 Degrees C Number of Rows Two Outside Diameter 110 mm Overall Width 44.4 mm Ring Material Alloy Steel System of Measurement Metric ABEC Rating 3