Angular Contact Ball Bearing Ball Material Alloy Steel Bearing Industry Number 7228 Bore Diameter 140 mm Cage Material Brass Closure Open Contact Angle 40 Degrees Contact Bearing Type Angular Contact Lubricant Material Grease Oil Matched Bearing Type Not Matched/Single Bearing Maximum Speed 2 300 RPM Maximum Temperature 120 Degrees C Minimum Temperature -40 Degrees C Number of Rows One Outside Diameter 250 mm Overall Width 42 mm Ring Material Alloy Steel