Needle Roller Bearing Bearing Industry Number 691 Bearing Design MJT-1 Bore Diameter 3/8 in Cage Material Steel Closure Single Sealed Full Complement No Lubricant Material Grease Oil Maximum Speed 18 000 RPM Maximum Temperature 250 Degrees F Minimum Temperature -5 Degrees F Needle Bearing Type Drawn Cup Needle Roller Bearing Number of Rows One Outside Diameter 9/16 in Overall Width 0.563 in Ring Material Alloy Steel Roller Material Alloy Steel Seal Type Contact