Needle Roller Bearing Bearing Industry Number 45 Bearing Design J Bore Diameter 1/4 in Cage Material Steel Closure Open Full Complement No Lubricant Material Grease Oil Maximum Speed 20 000 RPM Grease 30 000 RPM Oil Maximum Temperature 250 Degrees F Minimum Temperature -5 Degrees F Needle Bearing Type Drawn Cup Needle Roller Bearing Number of Rows One Outside Diameter 7/16 in Overall Width 0.313 in Ring Material Alloy Steel Roller Material Alloy Steel Seal Type Not Applicable