Angular Contact Ball Bearing, Bearing Industry Number 3310/5310, Bore Diameter 50 mm, Cage Material Steel, Closure Double Sealed, Contact Angle 30 Degrees , Contact Bearing Type Angular Contact, Lubricant Material Polyrex, Matched Bearing Type Not Matched/Single Bearing, Maximum Speed 4,000 RPM, Maximum Temperature 105 Degrees C, Minimum Temperature -20 Degrees C, Number of Rows Two, Outside Diameter 110 mm, Overall Width 44.4 mm, Ring Material Alloy Steel, Seal Type Contact