Angular Contact Ball Bearing Ball Material Ceramic Bearing Industry Number 7006 Bore Diameter 30 mm Cage Material Phenolic Closure Open Contact Angle 15 Degrees Contact Bearing Type Angular Contact Matched Bearing Type Duplex Maximum Speed 27 000 RPM Maximum Temperature 120 Degrees C Minimum Temperature -40 Degrees C Number of Rows One Outside Diameter 55 mm Overall Width 13 mm Ring Material Alloy Steel System of Measurement Metric ABEC Rating 7 Cage Type Stratified